Newest Lightroom Catalog wont open

My newest Lightroom catalog is apparently corrupted or something. I did get already the old catalog opened, but it is two months old and I would really like to open this latest one with newest edits. This doesn't agree at all. Only an icon like this appears here, but does not open Lightroom. However, it appears as a task in the task manager.
I have already reinstalled Lightroom a couple of times, opened the computer several times and done all the tricks what I got from here. Now Lightroom does open generally and with old catalog, but not with the newest catalog. How would I get that latest catalog opened or is it anyhow possible?😭 #Desperate

Windows. Lightroom version 13.4

[Moved from ‘Bugs’ to ‘Discussions’ by moderator, according to forum rules. A ‘bug’ is not just another word for any problem with software!]