Unable to load any of backed up catalog files

[Spit_MkI]

I have made a mistake when deleting some files and need to restore my catalog from backup. Fortunately I back up every time when leaving LR, thus I have plenty of files I can use. But when I try to unzip and open any of the catalog files from backup, Lightroom loads all the folders in library and than says:

I hit OK and try to open the catalog again. LR tries to repair the catalog, but never succeeds.

I also tried to open the backup on collegue´s computer and the scenario runs the same. Any idea what I can do? Thanks for any advice!

[Spit_MkI]

I also tried fixing a backup file according to this tutorial: How To Fix A Corrupted Lightroom catalog file using SQLite - YouTube

but when I run second command line, I get many lines like this:

Error: near line 197805: no such table: sqlite_stat4  

and the export .lrcat file remains blanc.