If you get one of these errors:
Updating hybrid configuration failed with error ‘System.Management.Automation.Remoting.PSRemotingTransportException: Processing data from remote server failed with the following error message: [ClientAccessServer=xxxxxxxx,BackEndServer=xxxxxxx,RequestId=xxxxxx, TimeStamp=xxxxx] [FailureCategory=WSMan-InvalidShellID] The request for the Windows Remote Shell with ShellId xxxxxxxxxxxxxxxxxxx failed because the shell was not found on the server. Possible causes are: the specified ShellId is incorrect or the shell no longer exists on the server. Provide the correct ShellId or create a new shell and retry the operation. For more information, see the about_Remote_Troubleshooting Help topic.
when trying to run hybrid wizzard configuration:
You might want to try turning off MFA for admin accounts – you give second factor code/consent whilst logging to the configurator, but obviously it later tries to run some commands in the background and these also enforces MFA.