Could not find layout General Audio 10?
I've been working on a song in GarageBand and when I turned it on this morning it says "Could not find layout General Audio 10." Others are saying to go to the menu and select GarageBand and click "Restore Sound Library" then "Update Sound Library", but neither of those are clickable for me. Anyone know how to fix this issue?
MacBook Pro with Retina display, OS X Yosemite (10.10)