Graph API for Windows Update doesn't work anymore

Hi,

i used the Graph API for Windows Update to get the catalog entries in a flow.

API: https://graph.microsoft.com/beta/admin/windows/updates/catalog/entries

Back in december it worked, but i wanted to test it again last fe days and now there is an error.

The correct permissions are configured and consented (WindowsUpdates.ReadWrite.All).

The Response:

Statuscode is forbidden but error code is UnknownError.

Maybe some of you having the same problem?
Can someone help me?

Thank you!