I've been seeing these errors on a fresh install of Jellyfin 10.11.2. On my upgraded server this used to work fine.
[NLP] :: [ERR] Failed to locate/set html body from template file..
System.IO.DirectoryNotFoundException: Could not find a part of the path '/run/s6-rc:s6-rc-init:LnNnIa/servicedirs/svc-jellyfin/config/plugins'.
at System.IO.Enumeration.FileSystemEnumerator`1.Init()
at System.IO.Enumeration.FileSystemEnumerableFactory.UserDirectories(String directory, String expression, EnumerationOptions options)
at Jellyfin.Plugin.Newsletters.Configuration.PluginConfiguration..ctor()
I've been seeing these errors on a fresh install of Jellyfin 10.11.2. On my upgraded server this used to work fine.