The authentication service URL that is defined in the SVC has a network address that cannot be resolved. You can use the 'svctask chauthservice' command to change the URL that is defined in the SVC for the authentication service.
Ensure that the authentication service is operating correctly. Ensure that the authentication service URL that is defined in the SVC is correct. Ensure that the network connection between the SVC cluster and the authentication service is operating correctly, and resubmit the task.