I got this one too !
I was able to fix the problem by copying my library locally on my hard drive. Before it was on my time capsule.
Then I could open it
BrunoSbille
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
From
Mons, Belgium
Post
Replies
Boosts
Views
Activity
I got this one too !
I was able to fix the problem by copying my library locally on my hard drive. Before it was on my time capsule.
Then I could open it