Cannot Add Song to some Playlists
I cannot add songs to some of my playlists. On my Mac, when I click add music to playlist, only some of my playlists are shown. I can see all of my playlists in Apple Music and I can play all of those playlists, but when I try to add a song it only presents me with some of the playlists.
I have tried opening the playlist in a separate window and dragging the song to it, but I does not add the song.
I have signed out of Apple Music and signed in again and I have turned off Sync and turned it back on again, but none of this solves the issue.