Adding map from TMX with Unicode symbols in filename fails

[Chris92de]

Describe the bug
Adding map from TMX with Unicode symbols in filename fails

Expected behavior
It should work.

To Reproduce
Please explain what led to the issue.
Example:

1. Try executing //add 273826
2. Click on Add
3. See error

Screenshots/Logs

[16:19:23] MxDownload::downloadMapAndGetFilename(): Request 273826 finished.

[16:19:23] MxDownload::downloadMapAndGetFilename(): Saving map as /server/UserData/Maps/MX/273826_Slay3r_ft_?ain.Map.Gbx

[16:19:23] MxDownload::addMap(): {"TrackID":273826,"Name":"Slay3r ft \u01a4ain","UserID":54153,"Username":"jorsh","MapType":"TM_Race","Length":2,"Type":0,"Environment":1,"Vehicle":1,"VehicleName":"CarSport","Mood":"Day","GbxMapName":"\ufeffSlay3r ft \u01a4ain","AuthorLogin":"OWcTuvl3TqOCvBD3GMnJng","DisplayCost":14867,"ModName":null,"Lightmap":8,"ExeVersion":"3.3.0","ExeBuild":"2025-07-04_14_15","ParserVersion":3,"UnlimiterRequired":false,"Laps":1,"Routes":0,"AwardCount":5,"Difficulty":0,"CommentCount":0,"UploadedAt":"2025-10-25T17:51:24.059","UpdatedAt":"2025-10-25T17:51:24.059","ActivityAt":"2025-10-25T17:51:24.059","ReplayType":0,"ReplayWRID":null,"TrackValue":50000,"ReplayCount":0,"Comments":"[align=center]No cap and gown, I ain't go to class\r\nI'd rather die before I come in last[\/align]\r\n","TitlePack":"TMStadium","Unlisted":false,"Unreleased":false,"Downloadable":true,"HasGhostBlocks":true,"EmbeddedObjectsCount":87,"EmbeddedItemsSize":1791783,"SizeWarning":false,"StyleName":"FullSpeed","UserRecord":null,"ReplayWRUserID":null,"ReplayWRTime":null,"ReplayWRUsername":null,"MappackID":0,"AuthorCount":2,"ImageCount":0,"VideoCount":0,"HasThumbnail":true,"HasScreenshot":false,"TrackUID":"_VD4TwsmC32PnzChrN_ofOBMtB3","AuthorTime":43055,"Tags":"2","DifficultyName":"Beginner","RouteName":"Single","LengthName":"45 secs","TypeName":"Race","EnvironmentName":"Stadium","IsMP4":true}

[16:19:23] MxDownload::addMap(): {"CheckpointsPerLaps":-1,"NbLaps":0,"DisplayCost":-1,"LightmapVersion":-1,"AuthorTime":43055,"GoldTime":46000,"SilverTime":52000,"BronzeTime":65000,"IsValidated":false,"PasswordProtected":false,"MapStyle":"","MapType":"TrackMania\\TM_Race","Mod":"","Decoration":"","Environment":"Stadium","PlayerModel":"","MapUid":"_VD4TwsmC32PnzChrN_ofOBMtB3","Comment":"","TitleId":"","AuthorLogin":"OWcTuvl3TqOCvBD3GMnJng","Name":"Slay3r ft \u01a4ain","ClassName":"","ClassId":"","FileName":"MX\/273826_Slay3r_ft_?ain.Map.Gbx"}

[16:19:23] Log::errorWithCause(): Adding map to selection failed: Map unknown.

EvoSC (please complete the following information):

• EvoSC-Version: 0.99.109
• Game: TM2020