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Unknown problem opening the catalog

Joined
Jan 27, 2021
Messages
12
Location
italy
Lightroom Experience
Intermediate
Lightroom Version
Classic
Lightroom Version
LR Classic latest updated 10.3
Operating System
  1. macOS 11.0 Big Sur
Since yesterday everything was ok. Today when I open LR Classic i get a message "cannot open because of an unknown problem" (my translation from italian.
If I try to open with a different catalog (from my backups but current LR version= LR_2019-2-v10.lrcat ) again the same message appears.
I'm on a Mac Pro (late 2013) Big Sur 11.4

Any suggestion much appreciated, thanks.
 

Attachments

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