Music app not creating new playlists on Apple Mini desktop

I am now using the Sonoma programme. I have been recording many of my CD's to my computer to allow me to enjoy my music while I am wording. For this purpose I have recorded them and then have moved all of part to a series of Playlists. Since a couple of days ago, the computer will not create new playlists. I have tried several things, i.e. turned off my computer and on again but nothing seems to work. Sometimes it pays to delete the app and reload it again but I am hesitating to do this with the Music app. Please advise!

[Re-Titled by Moderator]