@RHarrisTSNo but I found that we have some UI error in the event log : msft.sme.windows-update
source : appErrorHandler
timestamp : 1631024859385
message : ajax error 400


msft.sme.packetmon!main: RemoteException: The term 'pktmon' is not recognized as the name of a cmdlet

and in the dev tool of the browser (Firefox or Edge) we have this : 

{"error":{"code":"AuthenticationFailed","message":"Authentication failed. The 'Authorization' header is missing."}}