Hi, @Simon Schuck
The error is obvious. It's the standard error shown when a GPO is overwriting the local ConfigMgr wsus policy. Make sure that you don't have any custom GPO overwrite it.
You may use RSOP.MSC and gpedit.msc to check GPO following this article:
https://eskonr.com/2022/05/update-scan-failed-due-to-group-policy-settings-were-overwritten-by-a-higher-authority/
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