Problem with synchronizing fonts on creative cloud

Hello,
I have the Adobe license with several software (photoshop, ind, illustrator) and I have been using the Fonts application with Creative Cloud for years.

But for several weeks I have encountered a problem, the synchronization of fonts seems blocked. At first I could no longer add new fonts, and then now for several days, even the old fonts already installed have been desynchronized from the application. (see attached image) When I try to add a new font with Creative Cloud, I have the notification telling me "font installed" and the green dot. But then the application refreshes automatically and the dot turns red with the indication "unable to install the font".

The solutions already tried:
- Log out, and log back in.
- Delete the application and reinstall it.
- Delete all fonts and reinstall them.
- Do all the software updates, Adobe, Windows..

I don't understand anything, do you have any ideas and advice to give me please?

thank you for your help.