Solve library access problems from Windows File Explorer

Good morning,
I use access to libraries via Explorer to be able to save files directly without having to use drag and drop or the synchronization option (library volume!).

Overall it works well when I have no problems connecting to the site from the epxlorator.

I have configured the site to have the "open in file explorer" option in my Sharepoint views.
Unfortunately, I still get this message regularly, often following updates so I think it's an account problem of course.

Sometimes the problem resolves itself without even knowing why.
Do you have any ideas on the origin and what to do to resolve this problem?