Unable to register this appliance as manager of the server hardware

Symptom

Unable to register this appliance as manager of the server hardware: (followed by the failure message received from iLO).

ID: server-hardware.mp.config.ipmanagerblob.add

Severity: Critical

Health Category: Operational

Resource URI: /rest/server-hardware/{UUID}

Action
Restore access to the management processor, and then refresh the server hardware.