Client getting kicked with DecoderException when sending a DialogListDialog

[Andre601]

Bungeecord version

git:BungeeCord-Bootstrap:1.21-R0.4-SNAPSHOT:e62fc6c:1995

Server version

No response

Client version

1.21.8

Bungeecord plugins

AdvancedServerList 5.7.0-b2
cmd_find git:cmd_find:1.21-R0.4-SNAPSHOT:e62fc6c:1995
cmd_server git:cmd_server:1.21-R0.4-SNAPSHOT:e62fc6c:1995
cmd_alert git:cmd_alert:1.21-R0.4-SNAPSHOT:e62fc6c:1995
cmd_send git:cmd_send:1.21-R0.4-SNAPSHOT:e62fc6c:1995
cmd_list git:cmd_list:1.21-R0.4-SNAPSHOT:e62fc6c:1995

The bug

When trying to send a DialogListDialog to a player through a plugin is the client getting kicked for io.netty.handler.codec.DecoderException: Failed to decode packet 'clientbound/minecraft:show_dialog'

The full exception from the client report: https://paste.helpch.at/joqezexave.bash

In the SpigotMC Discord was it suggested that this is probably an issue with certain values not being properly escaped.

A few notes:

• I use own classes to create and show Dialogs in a platform-agnostic way to allow multi-platform support with a shared codebase.
  The methods used to create dialogs and show the dialog list utilize the Bungee API's Dialog system. You can see the code for Dialogs here and the code used for DialogListDialogs here
• I have a utility class called BungeeComponentParser, which I use to parse MiniMessage formatting into Adventure Components, followed by converting them into BungeeCord BaseComponents using the Adventure-library's platform support and the ComponentBuilder of BungeeCord.
  The full code of this class: https://paste.helpch.at/zupuyehufo.java

Log output (links)

No response

Checking

• I am using BungeeCord and not a fork. Issues with forks should not be reported here.
• I think this is not an issue with a bungeecord plugin.
• I have not read these checkboxes and therefore I just ticked them all.
• This is not a question or plugin creation help request.

[md-5]

Can you include a json representation of the dialog? And if possible a json representation of what it should be

[Andre601]

The client itself reports the SNBT format, which is more or less JSON.
Tho, here's a converted JSON version:

{"body": [{"contents": {"extra": [{"extra": [{"bold": 1, "color": "gold", "text": "WARNING!"}, {"text": "\n\nDialog-based profile editing is currently an "}, {"italic": 1, "text": "experimental feature"}, {"text": "!\nPlease create backups first before using it and report any bugs and/or glitches you may find."}], "text": ""}], "text": ""}, "type": "minecraft:plain_message"}], "columns": 3, "dialogs": [{"after_action": "none", "body": [{"contents": {"extra": [{"extra": [{"bold": 1, "color": "gold", "text": "WARNING!"}, {"text": "\n\nDialog-based profile editing is currently an "}, {"italic": 1, "text": "experimental feature"}, {"text": "!\nPlease create backups first before using it and report any bugs and/or glitches you may find."}], "text": ""}], "text": ""}, "type": "minecraft:plain_message"}], "inputs": [{"end": 100.0, "initial": 0.0, "key": "priority", "label": {"extra": [{"text": "Priority"}], "text": ""}, "labelFormat": "options.generic_value", "start": -100.0, "step": 1.0, "type": "minecraft:number_range"}, {"key": "condition", "label": {"extra": [{"text": "Condition"}], "text": ""}, "max_length": 100, "type": "minecraft:text"}, {"initial": "<grey>First Line\n<grey>Second Line", "key": "motd", "label": {"extra": [{"text": "MOTD"}], "text": ""}, "max_length": 100, "multiline": {"max_lines": 2}, "type": "minecraft:text"}, {"initial": "", "key": "favicon", "label": {"extra": [{"text": "Favicon"}], "text": ""}, "max_length": 100, "type": "minecraft:text"}, {"initial": 0, "key": "hidePlayers", "label": {"extra": [{"text": "Hide Player Count"}], "text": ""}, "on_false": "false", "on_true": "true", "type": "minecraft:boolean"}, {"initial": 0, "key": "hidePlayersHover", "label": {"extra": [{"text": "Hide Player Count Hover"}], "text": ""}, "on_false": "false", "on_true": "true", "type": "minecraft:boolean"}, {"initial": "<aqua>Line 1\n<yellow>Line 2\n<green>Line 3", "key": "hover", "label": {"extra": [{"text": "Player Count Hover"}], "text": ""}, "max_length": 200, "multiline": {"max_lines": 10}, "type": "minecraft:text"}, {"initial": "", "key": "text", "label": {"extra": [{"text": "Player Count Text"}], "text": ""}, "max_length": 100, "type": "minecraft:text"}, {"initial": 0, "key": "extraPlayersEnabled", "label": {"extra": [{"text": "Enable Extra Players"}], "text": ""}, "on_false": "false", "on_true": "true", "type": "minecraft:boolean"}, {"initial": "0", "key": "extraPlayersCount", "label": {"extra": [{"text": "Extra Players Count"}], "text": ""}, "max_length": 100, "type": "minecraft:text"}, {"initial": 0, "key": "maxPlayersEnabled", "label": {"extra": [{"text": "Enable Max Players"}], "text": ""}, "on_false": "false", "on_true": "true", "type": "minecraft:boolean"}, {"initial": "0", "key": "maxPlayersCount", "label": {"extra": [{"text": "Max Players Count"}], "text": ""}, "max_length": 100, "type": "minecraft:text"}, {"initial": 0, "key": "onlinePlayersEnabled", "label": {"extra": [{"text": "Enable Online Players"}], "text": ""}, "on_false": "false", "on_true": "true", "type": "minecraft:boolean"}, {"initial": "0", "key": "onlinePlayersCount", "label": {"extra": [{"text": "OnlinePlayers Count"}], "text": ""}, "max_length": 100, "type": "minecraft:text"}], "no": {"action": {"template": "/asl profiles edit default.yml", "type": "minecraft:dynamic/run_command"}, "label": {"extra": [{"text": "Back..."}], "text": ""}, "tooltip": {"extra": [{"color": "gray", "extra": [{"color": "red", "text": "lost"}, {"extra": [{"color": "green", "text": "Save changes"}, {"text": " button to save your changes."}], "text": "!\n\nClick the "}], "text": "Returns you to the main Dialog Screen.\nAny unsaved changes will be "}], "text": ""}}, "pause": 0, "title": {"extra": [{"text": "Main Settings"}], "text": ""}, "type": "minecraft:confirmation", "yes": {"action": {"id": "advancedserverlist:save/default.yml/-1", "type": "minecraft:dynamic/custom"}, "label": {"extra": [{"color": "green", "text": "Save changes"}], "text": ""}, "tooltip": {"extra": [{"color": "gray", "extra": [{"color": "aqua", "text": "/asl reload"}], "text": "Saves your changes made in this Dialog.\nApplying changes requires the use of "}], "text": ""}}}, {"after_action": "none", "body": [{"contents": {"extra": [{"extra": [{"bold": 1, "color": "gold", "text": "WARNING!"}, {"text": "\n\nDialog-based profile editing is currently an "}, {"italic": 1, "text": "experimental feature"}, {"text": "!\nPlease create backups first before using it and report any bugs and/or glitches you may find."}], "text": ""}], "text": ""}, "type": "minecraft:plain_message"}], "inputs": [{"initial": "<aqua>Line A\n<gold>Line B", "key": "motd", "label": {"extra": [{"text": "MOTD"}], "text": ""}, "max_length": 100, "multiline": {"max_lines": 2}, "type": "minecraft:text"}, {"initial": "", "key": "favicon", "label": {"extra": [{"text": "Favicon"}], "text": ""}, "max_length": 100, "type": "minecraft:text"}, {"initial": 0, "key": "hidePlayers", "label": {"extra": [{"text": "Hide Player Count"}], "text": ""}, "on_false": "false", "on_true": "true", "type": "minecraft:boolean"}, {"initial": 0, "key": "hidePlayersHover", "label": {"extra": [{"text": "Hide Player Count Hover"}], "text": ""}, "on_false": "false", "on_true": "true", "type": "minecraft:boolean"}, {"initial": "", "key": "hover", "label": {"extra": [{"text": "Player Count Hover"}], "text": ""}, "max_length": 200, "multiline": {"max_lines": 10}, "type": "minecraft:text"}, {"initial": "", "key": "text", "label": {"extra": [{"text": "Player Count Text"}], "text": ""}, "max_length": 100, "type": "minecraft:text"}, {"initial": 0, "key": "extraPlayersEnabled", "label": {"extra": [{"text": "Enable Extra Players"}], "text": ""}, "on_false": "false", "on_true": "true", "type": "minecraft:boolean"}, {"key": "extraPlayersCount", "label": {"extra": [{"text": "Extra Players Count"}], "text": ""}, "max_length": 100, "type": "minecraft:text"}, {"initial": 0, "key": "maxPlayersEnabled", "label": {"extra": [{"text": "Enable Max Players"}], "text": ""}, "on_false": "false", "on_true": "true", "type": "minecraft:boolean"}, {"key": "maxPlayersCount", "label": {"extra": [{"text": "Max Players Count"}], "text": ""}, "max_length": 100, "type": "minecraft:text"}, {"initial": 0, "key": "onlinePlayersEnabled", "label": {"extra": [{"text": "Enable Online Players"}], "text": ""}, "on_false": "false", "on_true": "true", "type": "minecraft:boolean"}, {"key": "onlinePlayersCount", "label": {"extra": [{"text": "Online Players Count"}], "text": ""}, "max_length": 100, "type": "minecraft:text"}], "no": {"action": {"template": "/asl profiles edit default.yml", "type": "minecraft:dynamic/run_command"}, "label": {"extra": [{"text": "Back..."}], "text": ""}, "tooltip": {"extra": [{"color": "gray", "extra": [{"color": "red", "text": "lost"}, {"extra": [{"color": "green", "text": "Save changes"}, {"text": " button to save your changes."}], "text": "!\n\nClick the "}], "text": "Returns you to the main Dialog Screen.\nAny unsaved changes will be "}], "text": ""}}, "pause": 0, "title": {"extra": [{"extra": [{"color": "aqua", "text": "#1"}], "text": "Profiles "}], "text": ""}, "type": "minecraft:confirmation", "yes": {"action": {"id": "advancedserverlist:save/default.yml/0", "type": "minecraft:dynamic/custom"}, "label": {"extra": [{"color": "green", "text": "Save changes"}], "text": ""}, "tooltip": {"extra": [{"color": "gray", "extra": [{"color": "aqua", "text": "/asl reload"}], "text": "Saves your changes made in this Dialog.\nApplying changes requires the use of "}], "text": ""}}}, {"after_action": "none", "body": [{"contents": {"extra": [{"extra": [{"bold": 1, "color": "gold", "text": "WARNING!"}, {"text": "\n\nDialog-based profile editing is currently an "}, {"italic": 1, "text": "experimental feature"}, {"text": "!\nPlease create backups first before using it and report any bugs and/or glitches you may find."}], "text": ""}], "text": ""}, "type": "minecraft:plain_message"}], "inputs": [{"initial": "<aqua>Line 1\n<gold>Line 2", "key": "motd", "label": {"extra": [{"text": "MOTD"}], "text": ""}, "max_length": 100, "multiline": {"max_lines": 2}, "type": "minecraft:text"}, {"initial": "", "key": "favicon", "label": {"extra": [{"text": "Favicon"}], "text": ""}, "max_length": 100, "type": "minecraft:text"}, {"initial": 0, "key": "hidePlayers", "label": {"extra": [{"text": "Hide Player Count"}], "text": ""}, "on_false": "false", "on_true": "true", "type": "minecraft:boolean"}, {"initial": 0, "key": "hidePlayersHover", "label": {"extra": [{"text": "Hide Player Count Hover"}], "text": ""}, "on_false": "false", "on_true": "true", "type": "minecraft:boolean"}, {"initial": "", "key": "hover", "label": {"extra": [{"text": "Player Count Hover"}], "text": ""}, "max_length": 200, "multiline": {"max_lines": 10}, "type": "minecraft:text"}, {"initial": "", "key": "text", "label": {"extra": [{"text": "Player Count Text"}],"text": ""}, "max_length": 100, "type": "minecraft:text"}, {"initial": 0, "key": "extraPlayersEnabled", "label": {"extra": [{"text": "Enable Extra Players"}], "text": ""}, "on_false": "false", "on_true": "true", "type": "minecraft:boolean"}, {"key": "extraPlayersCount", "label": {"extra": [{"text": "Extra Players Count"}], "text": ""}, "max_length": 100, "type": "minecraft:text"}, {"initial": 0, "key": "maxPlayersEnabled", "label": {"extra": [{"text": "Enable Max Players"}], "text": ""}, "on_false": "false", "on_true": "true", "type": "minecraft:boolean"}, {"key": "maxPlayersCount", "label": {"extra": [{"text": "Max Players Count"}], "text": ""}, "max_length": 100, "type": "minecraft:text"}, {"initial": 0, "key": "onlinePlayersEnabled", "label": {"extra": [{"text": "Enable Online Players"}], "text": ""}, "on_false": "false", "on_true": "true", "type": "minecraft:boolean"}, {"key": "onlinePlayersCount", "label": {"extra": [{"text": "Online Players Count"}], "text": ""}, "max_length": 100, "type": "minecraft:text"}], "no": {"action":{"template": "/asl profiles edit default.yml", "type": "minecraft:dynamic/run_command"}, "label": {"extra": [{"text": "Back..."}], "text": ""}, "tooltip": {"extra": [{"color": "gray", "extra": [{"color": "red", "text": "lost"}, {"extra": [{"color": "green", "text": "Save changes"}, {"text": " button to save your changes."}], "text": "!\n\nClick the "}], "text": "Returns you to the main Dialog Screen.\nAny unsaved changes will be "}], "text": ""}}, "pause": 0, "title": {"extra": [{"extra": [{"color": "aqua", "text": "#2"}], "text": "Profiles "}], "text": ""}, "type": "minecraft:confirmation", "yes": {"action": {"id": "advancedserverlist:save/default.yml/1", "type": "minecraft:dynamic/custom"}, "label": {"extra": [{"color": "green", "text": "Save changes"}], "text": ""}, "tooltip": {"extra": [{"color": "gray", "extra": [{"color": "aqua", "text": "/asl reload"}], "text": "Saves your changes made in this Dialog.\nApplying changes requires the use of "}], "text": ""}}}], "title": {"extra": [{"text": "default.yml"}], "text": ""}, "type":"minecraft:dialog_list"}

Prettified version with indents

{
  "body": [
    {
      "contents": {
        "extra": [
          {
            "extra": [
              {
                "bold": 1,
                "color": "gold",
                "text": "WARNING!"
              },
              {
                "text": "\n\nDialog-based profile editing is currently an "
              },
              {
                "italic": 1,
                "text": "experimental feature"
              },
              {
                "text": "!\nPlease create backups first before using it and report any bugs and/or glitches you may find."
              }
            ],
            "text": ""
          }
        ],
        "text": ""
      },
      "type": "minecraft:plain_message"
    }
  ],
  "columns": 3,
  "dialogs": [
    {
      "after_action": "none",
      "body": [
        {
          "contents": {
            "extra": [
              {
                "extra": [
                  {
                    "bold": 1,
                    "color": "gold",
                    "text": "WARNING!"
                  },
                  {
                    "text": "\n\nDialog-based profile editing is currently an "
                  },
                  {
                    "italic": 1,
                    "text": "experimental feature"
                  },
                  {
                    "text": "!\nPlease create backups first before using it and report any bugs and/or glitches you may find."
                  }
                ],
                "text": ""
              }
            ],
            "text": ""
          },
          "type": "minecraft:plain_message"
        }
      ],
      "inputs": [
        {
          "end": 100.0,
          "initial": 0.0,
          "key": "priority",
          "label": {
            "extra": [
              {
                "text": "Priority"
              }
            ],
            "text": ""
          },
          "labelFormat": "options.generic_value",
          "start": -100.0,
          "step": 1.0,
          "type": "minecraft:number_range"
        },
        {
          "key": "condition",
          "label": {
            "extra": [
              {
                "text": "Condition"
              }
            ],
            "text": ""
          },
          "max_length": 100,
          "type": "minecraft:text"
        },
        {
          "initial": "<grey>First Line\n<grey>Second Line",
          "key": "motd",
          "label": {
            "extra": [
              {
                "text": "MOTD"
              }
            ],
            "text": ""
          },
          "max_length": 100,
          "multiline": {
            "max_lines": 2
          },
          "type": "minecraft:text"
        },
        {
          "initial": "",
          "key": "favicon",
          "label": {
            "extra": [
              {
                "text": "Favicon"
              }
            ],
            "text": ""
          },
          "max_length": 100,
          "type": "minecraft:text"
        },
        {
          "initial": 0,
          "key": "hidePlayers",
          "label": {
            "extra": [
              {
                "text": "Hide Player Count"
              }
            ],
            "text": ""
          },
          "on_false": "false",
          "on_true": "true",
          "type": "minecraft:boolean"
        },
        {
          "initial": 0,
          "key": "hidePlayersHover",
          "label": {
            "extra": [
              {
                "text": "Hide Player Count Hover"
              }
            ],
            "text": ""
          },
          "on_false": "false",
          "on_true": "true",
          "type": "minecraft:boolean"
        },
        {
          "initial": "<aqua>Line 1\n<yellow>Line 2\n<green>Line 3",
          "key": "hover",
          "label": {
            "extra": [
              {
                "text": "Player Count Hover"
              }
            ],
            "text": ""
          },
          "max_length": 200,
          "multiline": {
            "max_lines": 10
          },
          "type": "minecraft:text"
        },
        {
          "initial": "",
          "key": "text",
          "label": {
            "extra": [
              {
                "text": "Player Count Text"
              }
            ],
            "text": ""
          },
          "max_length": 100,
          "type": "minecraft:text"
        },
        {
          "initial": 0,
          "key": "extraPlayersEnabled",
          "label": {
            "extra": [
              {
                "text": "Enable Extra Players"
              }
            ],
            "text": ""
          },
          "on_false": "false",
          "on_true": "true",
          "type": "minecraft:boolean"
        },
        {
          "initial": "0",
          "key": "extraPlayersCount",
          "label": {
            "extra": [
              {
                "text": "Extra Players Count"
              }
            ],
            "text": ""
          },
          "max_length": 100,
          "type": "minecraft:text"
        },
        {
          "initial": 0,
          "key": "maxPlayersEnabled",
          "label": {
            "extra": [
              {
                "text": "Enable Max Players"
              }
            ],
            "text": ""
          },
          "on_false": "false",
          "on_true": "true",
          "type": "minecraft:boolean"
        },
        {
          "initial": "0",
          "key": "maxPlayersCount",
          "label": {
            "extra": [
              {
                "text": "Max Players Count"
              }
            ],
            "text": ""
          },
          "max_length": 100,
          "type": "minecraft:text"
        },
        {
          "initial": 0,
          "key": "onlinePlayersEnabled",
          "label": {
            "extra": [
              {
                "text": "Enable Online Players"
              }
            ],
            "text": ""
          },
          "on_false": "false",
          "on_true": "true",
          "type": "minecraft:boolean"
        },
        {
          "initial": "0",
          "key": "onlinePlayersCount",
          "label": {
            "extra": [
              {
                "text": "Online Players Count"
              }
            ],
            "text": ""
          },
          "max_length": 100,
          "type": "minecraft:text"
        }
      ],
      "no": {
        "action": {
          "template": "/asl profiles edit default.yml",
          "type": "minecraft:dynamic/run_command"
        },
        "label": {
          "extra": [
            {
              "text": "Back..."
            }
          ],
          "text": ""
        },
        "tooltip": {
          "extra": [
            {
              "color": "gray",
              "extra": [
                {
                  "color": "red",
                  "text": "lost"
                },
                {
                  "extra": [
                    {
                      "color": "green",
                      "text": "Save changes"
                    },
                    {
                      "text": " button to save your changes."
                    }
                  ],
                  "text": "!\n\nClick the "
                }
              ],
              "text": "Returns you to the main Dialog Screen.\nAny unsaved changes will be "
            }
          ],
          "text": ""
        }
      },
      "pause": 0,
      "title": {
        "extra": [
          {
            "text": "Main Settings"
          }
        ],
        "text": ""
      },
      "type": "minecraft:confirmation",
      "yes": {
        "action": {
          "id": "advancedserverlist:save/default.yml/-1",
          "type": "minecraft:dynamic/custom"
        },
        "label": {
          "extra": [
            {
              "color": "green",
              "text": "Save changes"
            }
          ],
          "text": ""
        },
        "tooltip": {
          "extra": [
            {
              "color": "gray",
              "extra": [
                {
                  "color": "aqua",
                  "text": "/asl reload"
                }
              ],
              "text": "Saves your changes made in this Dialog.\nApplying changes requires the use of "
            }
          ],
          "text": ""
        }
      }
    },
    {
      "after_action": "none",
      "body": [
        {
          "contents": {
            "extra": [
              {
                "extra": [
                  {
                    "bold": 1,
                    "color": "gold",
                    "text": "WARNING!"
                  },
                  {
                    "text": "\n\nDialog-based profile editing is currently an "
                  },
                  {
                    "italic": 1,
                    "text": "experimental feature"
                  },
                  {
                    "text": "!\nPlease create backups first before using it and report any bugs and/or glitches you may find."
                  }
                ],
                "text": ""
              }
            ],
            "text": ""
          },
          "type": "minecraft:plain_message"
        }
      ],
      "inputs": [
        {
          "initial": "<aqua>Line A\n<gold>Line B",
          "key": "motd",
          "label": {
            "extra": [
              {
                "text": "MOTD"
              }
            ],
            "text": ""
          },
          "max_length": 100,
          "multiline": {
            "max_lines": 2
          },
          "type": "minecraft:text"
        },
        {
          "initial": "",
          "key": "favicon",
          "label": {
            "extra": [
              {
                "text": "Favicon"
              }
            ],
            "text": ""
          },
          "max_length": 100,
          "type": "minecraft:text"
        },
        {
          "initial": 0,
          "key": "hidePlayers",
          "label": {
            "extra": [
              {
                "text": "Hide Player Count"
              }
            ],
            "text": ""
          },
          "on_false": "false",
          "on_true": "true",
          "type": "minecraft:boolean"
        },
        {
          "initial": 0,
          "key": "hidePlayersHover",
          "label": {
            "extra": [
              {
                "text": "Hide Player Count Hover"
              }
            ],
            "text": ""
          },
          "on_false": "false",
          "on_true": "true",
          "type": "minecraft:boolean"
        },
        {
          "initial": "",
          "key": "hover",
          "label": {
            "extra": [
              {
                "text": "Player Count Hover"
              }
            ],
            "text": ""
          },
          "max_length": 200,
          "multiline": {
            "max_lines": 10
          },
          "type": "minecraft:text"
        },
        {
          "initial": "",
          "key": "text",
          "label": {
            "extra": [
              {
                "text": "Player Count Text"
              }
            ],
            "text": ""
          },
          "max_length": 100,
          "type": "minecraft:text"
        },
        {
          "initial": 0,
          "key": "extraPlayersEnabled",
          "label": {
            "extra": [
              {
                "text": "Enable Extra Players"
              }
            ],
            "text": ""
          },
          "on_false": "false",
          "on_true": "true",
          "type": "minecraft:boolean"
        },
        {
          "key": "extraPlayersCount",
          "label": {
            "extra": [
              {
                "text": "Extra Players Count"
              }
            ],
            "text": ""
          },
          "max_length": 100,
          "type": "minecraft:text"
        },
        {
          "initial": 0,
          "key": "maxPlayersEnabled",
          "label": {
            "extra": [
              {
                "text": "Enable Max Players"
              }
            ],
            "text": ""
          },
          "on_false": "false",
          "on_true": "true",
          "type": "minecraft:boolean"
        },
        {
          "key": "maxPlayersCount",
          "label": {
            "extra": [
              {
                "text": "Max Players Count"
              }
            ],
            "text": ""
          },
          "max_length": 100,
          "type": "minecraft:text"
        },
        {
          "initial": 0,
          "key": "onlinePlayersEnabled",
          "label": {
            "extra": [
              {
                "text": "Enable Online Players"
              }
            ],
            "text": ""
          },
          "on_false": "false",
          "on_true": "true",
          "type": "minecraft:boolean"
        },
        {
          "key": "onlinePlayersCount",
          "label": {
            "extra": [
              {
                "text": "Online Players Count"
              }
            ],
            "text": ""
          },
          "max_length": 100,
          "type": "minecraft:text"
        }
      ],
      "no": {
        "action": {
          "template": "/asl profiles edit default.yml",
          "type": "minecraft:dynamic/run_command"
        },
        "label": {
          "extra": [
            {
              "text": "Back..."
            }
          ],
          "text": ""
        },
        "tooltip": {
          "extra": [
            {
              "color": "gray",
              "extra": [
                {
                  "color": "red",
                  "text": "lost"
                },
                {
                  "extra": [
                    {
                      "color": "green",
                      "text": "Save changes"
                    },
                    {
                      "text": " button to save your changes."
                    }
                  ],
                  "text": "!\n\nClick the "
                }
              ],
              "text": "Returns you to the main Dialog Screen.\nAny unsaved changes will be "
            }
          ],
          "text": ""
        }
      },
      "pause": 0,
      "title": {
        "extra": [
          {
            "extra": [
              {
                "color": "aqua",
                "text": "#1"
              }
            ],
            "text": "Profiles "
          }
        ],
        "text": ""
      },
      "type": "minecraft:confirmation",
      "yes": {
        "action": {
          "id": "advancedserverlist:save/default.yml/0",
          "type": "minecraft:dynamic/custom"
        },
        "label": {
          "extra": [
            {
              "color": "green",
              "text": "Save changes"
            }
          ],
          "text": ""
        },
        "tooltip": {
          "extra": [
            {
              "color": "gray",
              "extra": [
                {
                  "color": "aqua",
                  "text": "/asl reload"
                }
              ],
              "text": "Saves your changes made in this Dialog.\nApplying changes requires the use of "
            }
          ],
          "text": ""
        }
      }
    },
    {
      "after_action": "none",
      "body": [
        {
          "contents": {
            "extra": [
              {
                "extra": [
                  {
                    "bold": 1,
                    "color": "gold",
                    "text": "WARNING!"
                  },
                  {
                    "text": "\n\nDialog-based profile editing is currently an "
                  },
                  {
                    "italic": 1,
                    "text": "experimental feature"
                  },
                  {
                    "text": "!\nPlease create backups first before using it and report any bugs and/or glitches you may find."
                  }
                ],
                "text": ""
              }
            ],
            "text": ""
          },
          "type": "minecraft:plain_message"
        }
      ],
      "inputs": [
        {
          "initial": "<aqua>Line 1\n<gold>Line 2",
          "key": "motd",
          "label": {
            "extra": [
              {
                "text": "MOTD"
              }
            ],
            "text": ""
          },
          "max_length": 100,
          "multiline": {
            "max_lines": 2
          },
          "type": "minecraft:text"
        },
        {
          "initial": "",
          "key": "favicon",
          "label": {
            "extra": [
              {
                "text": "Favicon"
              }
            ],
            "text": ""
          },
          "max_length": 100,
          "type": "minecraft:text"
        },
        {
          "initial": 0,
          "key": "hidePlayers",
          "label": {
            "extra": [
              {
                "text": "Hide Player Count"
              }
            ],
            "text": ""
          },
          "on_false": "false",
          "on_true": "true",
          "type": "minecraft:boolean"
        },
        {
          "initial": 0,
          "key": "hidePlayersHover",
          "label": {
            "extra": [
              {
                "text": "Hide Player Count Hover"
              }
            ],
            "text": ""
          },
          "on_false": "false",
          "on_true": "true",
          "type": "minecraft:boolean"
        },
        {
          "initial": "",
          "key": "hover",
          "label": {
            "extra": [
              {
                "text": "Player Count Hover"
              }
            ],
            "text": ""
          },
          "max_length": 200,
          "multiline": {
            "max_lines": 10
          },
          "type": "minecraft:text"
        },
        {
          "initial": "",
          "key": "text",
          "label": {
            "extra": [
              {
                "text": "Player Count Text"
              }
            ],
            "text": ""
          },
          "max_length": 100,
          "type": "minecraft:text"
        },
        {
          "initial": 0,
          "key": "extraPlayersEnabled",
          "label": {
            "extra": [
              {
                "text": "Enable Extra Players"
              }
            ],
            "text": ""
          },
          "on_false": "false",
          "on_true": "true",
          "type": "minecraft:boolean"
        },
        {
          "key": "extraPlayersCount",
          "label": {
            "extra": [
              {
                "text": "Extra Players Count"
              }
            ],
            "text": ""
          },
          "max_length": 100,
          "type": "minecraft:text"
        },
        {
          "initial": 0,
          "key": "maxPlayersEnabled",
          "label": {
            "extra": [
              {
                "text": "Enable Max Players"
              }
            ],
            "text": ""
          },
          "on_false": "false",
          "on_true": "true",
          "type": "minecraft:boolean"
        },
        {
          "key": "maxPlayersCount",
          "label": {
            "extra": [
              {
                "text": "Max Players Count"
              }
            ],
            "text": ""
          },
          "max_length": 100,
          "type": "minecraft:text"
        },
        {
          "initial": 0,
          "key": "onlinePlayersEnabled",
          "label": {
            "extra": [
              {
                "text": "Enable Online Players"
              }
            ],
            "text": ""
          },
          "on_false": "false",
          "on_true": "true",
          "type": "minecraft:boolean"
        },
        {
          "key": "onlinePlayersCount",
          "label": {
            "extra": [
              {
                "text": "Online Players Count"
              }
            ],
            "text": ""
          },
          "max_length": 100,
          "type": "minecraft:text"
        }
      ],
      "no": {
        "action": {
          "template": "/asl profiles edit default.yml",
          "type": "minecraft:dynamic/run_command"
        },
        "label": {
          "extra": [
            {
              "text": "Back..."
            }
          ],
          "text": ""
        },
        "tooltip": {
          "extra": [
            {
              "color": "gray",
              "extra": [
                {
                  "color": "red",
                  "text": "lost"
                },
                {
                  "extra": [
                    {
                      "color": "green",
                      "text": "Save changes"
                    },
                    {
                      "text": " button to save your changes."
                    }
                  ],
                  "text": "!\n\nClick the "
                }
              ],
              "text": "Returns you to the main Dialog Screen.\nAny unsaved changes will be "
            }
          ],
          "text": ""
        }
      },
      "pause": 0,
      "title": {
        "extra": [
          {
            "extra": [
              {
                "color": "aqua",
                "text": "#2"
              }
            ],
            "text": "Profiles "
          }
        ],
        "text": ""
      },
      "type": "minecraft:confirmation",
      "yes": {
        "action": {
          "id": "advancedserverlist:save/default.yml/1",
          "type": "minecraft:dynamic/custom"
        },
        "label": {
          "extra": [
            {
              "color": "green",
              "text": "Save changes"
            }
          ],
          "text": ""
        },
        "tooltip": {
          "extra": [
            {
              "color": "gray",
              "extra": [
                {
                  "color": "aqua",
                  "text": "/asl reload"
                }
              ],
              "text": "Saves your changes made in this Dialog.\nApplying changes requires the use of "
            }
          ],
          "text": ""
        }
      }
    }
  ],
  "title": {
    "extra": [
      {
        "text": "default.yml"
      }
    ],
    "text": ""
  },
  "type": "minecraft:dialog_list"
}

Edit: Not sure why the compacted version reports syntax errors and the second doesn't.
They both are made through the same python script from the same snbt format.

[Janmm14]

the compact version reports syntax errors due to line breaks inside strings

[Andre601]

the compact version reports syntax errors due to line breaks inside strings

That makes no sense as there are line breaks much earlier, yet it doesn't highlight those parts in red.

[Janmm14]

the compact version reports syntax errors due to line breaks inside strings

That makes no sense as there are line breaks much earlier, yet it doesn't highlight those parts in red.

the first red i see in your "compact" post is end of line 1 + start of line 2, where the first line break is inside string. I am not talking about "\n" inside strings, but actual new line characters.

[Andre601]

Yeah, no, the render is just stupid.

Also, this doesn't matter for the issue at hand and is just off-topic at this point.

[Janmm14]

I've hidden my comments as offtopic, you can do it with your answers as well.

Also here with line breaks only outside of json strings and not before json doubledots(:)

Spoiler

And then it renders just fine.

{"body": [{"contents": {"extra": [{"extra": [{"bold": 1, "color": "gold", "text": "WARNING!"}, {"text":
"\n\nDialog-based profile editing is currently an "}, {"italic": 1, "text": "experimental feature"},
 {"text": "!\nPlease create backups first before using it and report any bugs and/or glitches you may find."}],
 "text": ""}], "text": ""}, "type": "minecraft:plain_message"}], "columns": 3, "dialogs": [{"after_action":
"none", "body": [{"contents": {"extra": [{"extra": [{"bold": 1, "color":
"gold", "text": "WARNING!"},  {"text": "\n\nDialog-based profile editing is currently an "},
{"italic": 1, "text": "experimental feature"},
{"text": "!\nPlease create backups first before using it and report any bugs and/or glitches you may find."}],
"text": ""}], "text": ""},"type": "minecraft:plain_message"}], "inputs": [{"end": 100.0, "initial": 0.0,
"key": "priority", "label": {"extra": [{"text": "Priority"}], "text": ""}, "labelFormat":
"options.generic_value", "start": -100.0, "step": 1.0, "type":"minecraft:number_range"}, {"key": "condition",
"label": {"extra": [{"text": "Condition"}], "text": ""}, "max_length": 100, "type": "minecraft:text"},
{"initial": "<grey>First Line\n<grey>Second Line", "key": "motd", "label": {"extra": [{"text": "MOTD"}],
"text": ""}, "max_length": 100, "multiline": {"max_lines": 2}, "type": "minecraft:text"}, {"initial":
"", "key": "favicon", "label": {"extra": [{"text": "Favicon"}], "text": ""}, "max_length": 100,
"type": "minecraft:text"}, {"initial": 0, "key": "hidePlayers", "label": {"extra": [{"text": "Hide Player Count"
}], "text": ""}, "on_false": "false", "on_true": "true", "type": "minecraft:boolean"}, {"initial": 0, "key":
"hidePlayersHover", "label": {"extra": [{"text": "Hide Player Count Hover"}], "text": ""}, "on_false": "false",
"on_true": "true", "type": "minecraft:boolean"}, {"initial":
"<aqua>Line 1\n<yellow>Line 2\n<green>Line 3", "key": "hover", "label": {"extra": [{"text":
"Player Count Hover"}], "text": ""}, "max_length": 200, "multiline": {"max_lines": 10}, "type":
"minecraft:text"}, {"initial": "", "key": "text", "label": {"extra": [{"text": "Player Count Text"}], "text":
""}, "max_length": 100, "type": "minecraft:text"}, {"initial": 0, "key": "extraPlayersEnabled", "label":
{"extra": [{"text": "Enable Extra Players"}], "text": ""}, "on_false": "false", "on_true": "true", "type":
"minecraft:boolean"}, {"initial": "0", "key": "extraPlayersCount", "label": {"extra": [{"text":
"Extra Players Count"}], "text": ""}, "max_length": 100, "type": "minecraft:text"}, {"initial": 0, "key":
"maxPlayersEnabled", "label": {"extra": [{"text": "Enable Max Players"}], "text": ""}, "on_false": "false",
"on_true": "true", "type": "minecraft:boolean"}, {"initial": "0", "key": "maxPlayersCount", "label":
{"extra": [{"text": "Max Players Count"}], "text": ""}, "max_length": 100, "type": "minecraft:text"},
{"initial": 0, "key": "onlinePlayersEnabled", "label": {"extra": [{"text": "Enable Online Players"}], "text":
""}, "on_false": "false", "on_true": "true", "type": "minecraft:boolean"}, {"initial": "0", "key":
"onlinePlayersCount", "label": {"extra": [{"text": "OnlinePlayers Count"}], "text": ""}, "max_length": 100,
"type": "minecraft:text"}], "no": {"action": {"template": "/asl profiles edit default.yml", "type":
"minecraft:dynamic/run_command"}, "label": {"extra": [{"text": "Back..."}], "text": ""}, "tooltip": {"extra":
[{"color": "gray", "extra": [{"color": "red", "text": "lost"}, {"extra": [{"color": "green", "text":
"Save changes"}, {"text": " button to save your changes."}], "text": "!\n\nClick the "}], "text":
"Returns you to the main Dialog Screen.\nAny unsaved changes will be "}], "text": ""}}, "pause": 0, "title":
{"extra": [{"text": "Main Settings"}], "text": ""}, "type": "minecraft:confirmation", "yes": {"action":
{"id": "advancedserverlist:save/default.yml/-1", "type": "minecraft:dynamic/custom"}, "label": {"extra":
[{"color": "green", "text": "Save changes"}], "text": ""}, "tooltip": {"extra": [{"color": "gray", "extra":
[{"color": "aqua", "text": "/asl reload"}], "text":
"Saves your changes made in this Dialog.\nApplying changes requires the use of "}], "text": ""}}},
{"after_action": "none", "body": [{"contents": {"extra": [{"extra": [{"bold": 1, "color": "gold", "text":
"WARNING!"}, {"text": "\n\nDialog-based profile editing is currently an "}, {"italic": 1, "text":
"experimental feature"}, {"text":
"!\nPlease create backups first before using it and report any bugs and/or glitches you may find."}],
"text": ""}], "text": ""}, "type": "minecraft:plain_message"}], "inputs": [{"initial":
"<aqua>Line A\n<gold>Line B", "key": "motd", "label": {"extra": [{"text": "MOTD"}], "text": ""}, "max_length":
100, "multiline": {"max_lines": 2}, "type": "minecraft:text"}, {"initial": "", "key": "favicon", "label":
{"extra": [{"text": "Favicon"}], "text": ""}, "max_length": 100, "type": "minecraft:text"}, {"initial": 0,
"key": "hidePlayers", "label": {"extra": [{"text": "Hide Player Count"}], "text": ""}, "on_false": "false",
"on_true": "true", "type": "minecraft:boolean"}, {"initial": 0, "key": "hidePlayersHover", "label": {"extra":
[{"text": "Hide Player Count Hover"}], "text": ""}, "on_false": "false", "on_true": "true",  "type":
"minecraft:boolean"}, {"initial": "", "key": "hover", "label": {"extra": [{"text": "Player Count Hover"}],
"text": ""}, "max_length": 200, "multiline": {"max_lines": 10}, "type": "minecraft:text"}, {"initial": "",
"key": "text", "label": {"extra": [{"text": "Player Count Text"}], "text": ""}, "max_length": 100, "type":
"minecraft:text"}, {"initial": 0, "key": "extraPlayersEnabled", "label": {"extra": [{"text":
"Enable Extra Players"}], "text": ""}, "on_false": "false", "on_true": "true", "type": "minecraft:boolean"},
{"key": "extraPlayersCount", "label": {"extra": [{"text": "Extra Players Count"}], "text": ""}, "max_length":
100, "type": "minecraft:text"}, {"initial": 0, "key": "maxPlayersEnabled", "label": {"extra": [{"text":
"Enable Max Players"}], "text": ""}, "on_false": "false", "on_true": "true", "type": "minecraft:boolean"},
{"key": "maxPlayersCount", "label": {"extra": [{"text": "Max Players Count"}], "text": ""}, "max_length": 100,
"type": "minecraft:text"}, {"initial": 0, "key": "onlinePlayersEnabled", "label": {"extra": [{"text":
"Enable Online Players"}], "text": ""}, "on_false": "false", "on_true": "true", "type": "minecraft:boolean"},
{"key": "onlinePlayersCount", "label": {"extra": [{"text": "Online Players Count"}], "text": ""}, "max_length":
100, "type": "minecraft:text"}], "no":
{"action": {"template": "/asl profiles edit default.yml", "type": "minecraft:dynamic/run_command"}, "label":
{"extra": [{"text": "Back..."}], "text": ""}, "tooltip": {"extra": [{"color": "gray", "extra": [{"color":
"red", "text": "lost"}, {"extra": [{"color": "green", "text": "Save changes"}, {"text":
" button to save your changes."}], "text": "!\n\nClick the "}], "text":
"Returns you to the main Dialog Screen.\nAny unsaved changes will be "}], "text": ""}}, "pause": 0, "title":
{"extra": [{"extra": [{"color": "aqua", "text": "#1"}], "text": "Profiles "}], "text": ""}, "type":
"minecraft:confirmation", "yes": {"action": {"id": "advancedserverlist:save/default.yml/0", "type":
"minecraft:dynamic/custom"}, "label": {"extra": [{"color": "green", "text": "Save changes"}], "text": ""},
"tooltip": {"extra": [{"color": "gray", "extra": [{"color": "aqua", "text": "/asl reload"}], "text":
"Saves your changes made in this Dialog.\nApplying changes requires the use of "}], "text": ""}}},
{"after_action": "none", "body": [{"contents": {"extra": [{"extra": [{"bold": 1, "color": "gold", "text":
"WARNING!"}, {"text": "\n\nDialog-based profile editing is currently an "}, {"italic": 1, "text":
"experimental feature"}, {"text":
"!\nPlease create backups first before using it and report any bugs and/or glitches you may find."}], "text":
""}], "text": ""}, "type": "minecraft:plain_message"}], "inputs": [{"initial": "<aqua>Line 1\n<gold>Line 2",
"key": "motd", "label": {"extra": [{"text": "MOTD"}], "text": ""}, "max_length": 100, "multiline":
{"max_lines": 2}, "type": "minecraft:text"}, {"initial": "", "key": "favicon", "label": {"extra": [{"text":
"Favicon"}], "text": ""}, "max_length": 100, "type": "minecraft:text"}, {"initial": 0, "key": "hidePlayers",
"label": {"extra": [{"text": "Hide Player Count"}], "text": ""}, "on_false": "false", "on_true": "true", "type":
"minecraft:boolean"}, {"initial": 0, "key": "hidePlayersHover", "label": {"extra": [{"text":
"Hide Player Count Hover"}], "text": ""}, "on_false": "false", "on_true": "true", "type": "minecraft:boolean"},
{"initial": "", "key": "hover", "label": {"extra": [{"text": "Player Count Hover"}], "text": ""}, "max_length":
200, "multiline": {"max_lines": 10}, "type": "minecraft:text"}, {"initial": "", "key": "text", "label": {
"extra": [{"text": "Player Count Text"}], "text": ""}, "max_length": 100, "type": "minecraft:text"}, {"initial":
0, "key": "extraPlayersEnabled", "label": {"extra": [{"text": "Enable Extra Players"}], "text": ""}, "on_false":
"false", "on_true": "true", "type": "minecraft:boolean"}, {"key": "extraPlayersCount", "label": {"extra":
[{"text": "Extra Players Count"}], "text": ""}, "max_length": 100, "type": "minecraft:text"}, {"initial": 0,
"key": "maxPlayersEnabled", "label": {"extra": [{"text": "Enable Max Players"}], "text": ""}, "on_false":
"false", "on_true": "true", "type": "minecraft:boolean"}, {"key": "maxPlayersCount", "label": {"extra":
[{"text": "Max Players Count"}], "text": ""}, "max_length": 100, "type": "minecraft:text"}, {"initial": 0,
"key": "onlinePlayersEnabled", "label": {"extra": [{"text": "Enable Online Players"}], "text": ""}, "on_false":
"false", "on_true": "true", "type": "minecraft:boolean"}, {"key": "onlinePlayersCount", "label": {"extra":
[{"text": "Online Players Count"}], "text": ""}, "max_length": 100, "type": "minecraft:text"}], "no": {"action":
{"template": "/asl profiles edit default.yml", "type": "minecraft:dynamic/run_command"}, "label": {"extra":
[{"text": "Back..."}], "text": ""}, "tooltip": {"extra": [{"color": "gray", "extra": [{"color": "red", "text":
"lost"}, {"extra": [{"color": "green", "text": "Save changes"}, {"text": " button to save your changes."}],
"text": "!\n\nClick the "}], "text": "Returns you to the main Dialog Screen.\nAny unsaved changes will be "}],
"text": ""}}, "pause": 0, "title": {"extra": [{"extra": [{"color": "aqua", "text": "#2"}], "text": "Profiles "
}], "text": ""}, "type": "minecraft:confirmation", "yes": {"action": {"id":
"advancedserverlist:save/default.yml/1", "type": "minecraft:dynamic/custom"}, "label": {"extra": [{"color":
"green", "text": "Save changes"}], "text": ""}, "tooltip": {"extra": [{"color": "gray", "extra": [{"color":
"aqua", "text": "/asl reload"}], "text":
"Saves your changes made in this Dialog.\nApplying changes requires the use of "}], "text": ""}}}], "title":
{"extra": [{"text": "default.yml"}], "text": ""}, "type": "minecraft:dialog_list"}

[Andre601]

Is there any update on this?
It's kind of a blocking issue for me, as it prevents me from releasing an update.

[md-5]

It'd be quicker/easier to debug with a minimum reproducible example

[Andre601]

Can't really make a minimum reproducable example, as I don't even know what part is failing to begin with.

Also, as I stated in my OP am I using a setup that allows me a more platform-independant aproach.
I'm sure the code to make a reproducable aproach can be extraced from the classes I shared:
https://paste.helpch.at/jocixoxiko.java
https://paste.helpch.at/oruvefucom.java