Family Sharing music 'not authorized'

I recently set-up family sharing and am having problems with the music downloaded from a family member. Trying to play a song results in the message that the computer is 'not authorized' and it asks for my Apple ID and password. If I put that info in, a message pops up that the computer is already authorized. The end result is that the music doesn't play.

I've tried de-authorizing and re-authorizing, to no avail. Any help would be greatly appreciated.