Since today, all my previous racks are just showing empty cases.

They look ok in command center, but when i choose 1 for viewing/editing,
the racks does not show any modules anymore and i cant edit them. (data sheet is still there)
The top buttons-row for editing just don´t work, except for command center.

Any ideas whats wrong here?

Add: just tested, via mobile seems to work, but via PC won´t.