Storyboard Pro 22 doesn't save backups

Hi community,
I’m using STB-Pro 22 for a few days now and I can’t create a backup file of my document (“Unable to create backup file”).
It also doesn’t save the file in another folder (which I wanted to use as a backup instead):
"The Save As operation could not be completed. Verify the file permissions in your project, as well as in the destination directory, then try to save again.

Save As aborted."

Any ideas?
I’m working on MacOS Ventura 13.0.1

Thanks in advance and cheers,
Nils

Update: I tried to use STB-Pro 20.1 (because of the drag and drop issues with 20 and Ventura) but it’s the same thing: no backups possible. And it’s even worse: after opening my yesterday project today, I realised that it didn’t have saved my stuff anymore from a certain point! So, lost a lot of work there…
→ Big issues with Ventura, try to avoid updating, if you are working with STB-Pro a lot.