SOLVED: Music playlists don't work / Blank

[lukasitaly]

I'm new to Jellyfin and could use some help with creating playlists for my music. I've uploaded my files using the recommended structure, but I'm having trouble making playlists.

For example, when I try to add a Bob Marley album ("Exodus") to a playlist, I click the three dots, select "Add to playlist",
     
create a new playlist, and it shows up empty—no metadata, no music, just a blank playlist.  
   
This happens with all albums I try. I've also attempted adding songs one by one and creating an empty playlist to add songs later, but nothing seems to work.

Am I missing something? Any advice would be greatly appreciated. Thank you so much for your help!