Lightoom Catalog damaged / empty after "repairing"

Hi guys,

I am using Lightroom Classic on a Windows Laptop with a local catalog beeing stored on the Laptop. I get frequently error messages that my catalog is beeing damaged usually the repair is no problem, afterwards everything is working properly. This time the catalog after the "repair" was completely empty.

I am using a Synology Drive as a backup in my local network to sync the files from my Laptop. I sometimes have the feeling that Lightroom and the Synology Drive do not get along quite well due to errors in reading / writing files.

Anybody has an idea how to proceed? When I want to open the backup I also get an error message.I can a stop those regular damaged catalogues?

Thanks for your supprt.

Sebastian