Trakt add-on not exporting new library additions to collection.

[TheDreadPirate]

Ok. I see you mentioned that you tried reinstalling the plugin. But I was wondering if files were left behind that the reinstalled plugin is continuing to use. Perhaps with a bad authentication token.

So I uninstalled the plugin and found that there is still an XML left behind and it does contain all the access tokens in it. So I'm thinking that somehow the Trakt plugin isn't updating that XML on your system and this fragment survives reinstalls with the bad token.

You shouldn't need to reinstall the plugin, but let's go ahead revoke this device's access, uninstall the Trakt plugin, then restart Jellyfin. I don't have a Windows system anymore so I'm going from memory, the XML with the Trakt tokens should be C:\ProgramData\Jellyfin\Server\plugins\configurations\Trakt.xml.

Delete that file. Reinstall the Trakt plugin, restart Jellyfin, reauthorized, and then try to export to Trakt again.