Upgraded to Cataline on MacPro now can't listen to music from library

Hi please help....

I upgraded to Catalina on my MacBook Pro and am signed in to my apple account, but I cannot access any of my music from the library or playlists in the music app.

It shows the songs/albums but they are shaded out and when I click on them it doesn't play.

I can see a little message in the bottom left of the music app screen that says "An error occurred" but it doesn't give me any more information.

I am trying to organise music for my mums funeral in a few days time and I am very stressed that I can't get this to work :(

thanks Lance C - Sydney, Australia