Error "Resource not provisioned in service stamp"

can someone please help with the following

when I try to use the PowerShell cmdlet Set-OBMachineSetting I get the following error

Set-OBMachineSetting : The current operation failed due to an internal service error "Resource not provisioned in
service stamp". Please retry the operation after some time. If the issue persists, please contact Microsoft support.
At line:1 char:1
+ Set-OBMachineSetting -EncryptionPassPhrase $PassPhrase -SecurityPin " ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Set-OBMachineSetting], DlsException
    + FullyQualifiedErrorId : ResourceNotYetProvisioned,Microsoft.Internal.CloudBackup.Commands.SetCBMachineSettingCom
   mand

The node (computer) is an on-premise 2019 Core Server that was previously on-boarded to Azure using the Start-OBRegistration  cmdlet. This registration was successful.  I have generated and used a new PIN but still get the same error.

Any advise please

Thanks

CXMelga