Jobs are failing with the error: "0xe000e005 - The job has reported multiple errors. See the job log for details." randomly.
The errors that may be seen in the job logs are: Physical Volume Library Drive or Robot paused, offline, or disabled.- or - Final error: 0xe000e005 - The job has reported multiple errors. See the job log for details. -536813563
One cause of this is faulty fiber cables. Faulty fiber cables my cause this error to occur randomly before potentially failing outright.
Another possible cause might also be a faulty fiber channel switch port.
Check all cables and ports for errors and test backups again.
Contact the manufacturer of the hardware for clearly identifying and confirming any hardware issues that may be present.
Example: When attempting to communicate with MSL4048 Fiber Library via fiber channel switch, device will randomly go offline causing job failure and the reported error messages.