CMMVC9788E The command failed because the single sign-on authentication credentials have not been set.
Explanation
The error occurred because an attempt was made to enable the single sign-on authentication service, but either the OpenID Connect client ID or the OpenID Connect client secret has not been set. The single sign-on authentication service cannot be enabled without specifying both required credentials.
User response
Set the OpenID Connect client ID, and the OpenID Connect client secret credentials and rerun the command.