Deactivation failed - Trados Studio 2021

In the past, I had no problems deactivating and reactivating my Trados Studio 2021 licence, but now I am getting this error message:

“Deactivation failed. Could not connect to the activation server. Check the activation server address in the provider settings. - The remote server returned an error: (403) Forbidden.”

I can no longer deactivate the licence and am stuck. I am using Windows 11 in case this info is useful. How can this get fixed? Thanks a lot for your help.

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