Unable to add app - because forking this repo does not seem to work

If I try to follow the instructions [here](https://github.com/AppImage/appimage.github.io?tab=readme-ov-file#how-to-submit-appimages-to-the-catalog), I run into the problem that the repo cannot be forked:

This is **not** a temporary problem. Has been like that for several days 😟

Also, I am pretty usre that this is **not** a problem with my account, as I have forked various other repos without problem.

Regards.