Symptoms
Attempt to delete the manual backup fails with an error like:
resourceUuid cannot be null or empty
Cause
Backup creation is still in progress. Since the procedure is not finished, not all APS resource's properties are filled, leading to an exception.
This behaviour is excepted, however, to make the situation more clear, the error message will be improved in the scope of the request CCU-16785.
Resolution
Wait until the backup procedure is finished.