I use GrapheneOS based on Android 13. The App did never work. I have set storage scopes so that it can access my music folders. /storage/emulated/0/Music for the playlist .m3u files, and my other folder for the actual songs. In Elisa I tried reloading the database, switching to file-based and added my music folder (with subfolders instead of playlists as I dont like Playlists). Adding opened the Android filechooser portal, but the app crashed. Opening it again, nothing changed, still no music shown in any tab. Version from yesterday, F-Droid
*** This bug has been marked as a duplicate of bug 444475 ***