@JU313: "Deactivating all plug-ins and restart LR does not help in my system."
The only workaround posted in this thread that's worked for more than a couple people:
Try making a new user account and logging in to that. Lightroom and its components scatter all sorts of information in hidden user-account folders, and logging in as a new user is a quick way to test if it's gotten corrupted and causing the problem.
When you get to the dialog "How will this person sign in?", click "I don't have this person's sign-in information" to create a local account, not a "Microsoft" account.
Come on guys, I understand this Adobe bashing as they do not care at all about their Community - I think they just want to get rid of standalone versions and migrate us to the cloud
BUT: I assume the root cause lies in external modules, which might vary. As mentioned above, it took me a while to identify. But after disabling all modules and restart of lightroom, the issue was fixed
I'd be happy to help get you an answer to this issue, but first, I need a few more details. Can you share your system info? You can find this by going to Help > System Info while in Lightroom Classic.
^CM
P.S. I've also moved your post to the Lightroom Classic Board.
It is almost a year since i reported this error. Several updates later - including a major revision update - and Adobe has still not addressed this issue, expecting their customers to resort to all kinds of risky hacks in order to get their software working. Apprently they prioritize pumping Lightroom full og all kinds of A.I. crap-features, instead of making the core product work. I guess its time to move on from Adobe - that's a hard call after so many years