I have been using Paragon Hard Disk Manager 17 Advanced for a couple of months now on 3 machines (the software was purchased in February 2020). On 2 of them everything continues to go well but one of them keeps giving me an error when I try to back up a RAID volume (3 striped hard drives in the volume). It had done it successfully twice before but now I get the following error soon after the backup starts:

Description
Scheduled backup failed
Reason
NT specific error (0xC000009C):
STATUS_DEVICE_DATA_ERROR
Error source:
Error code: 0xc000009c

Does anybody have a clue as to what is causing this and how it can be fixed. The RAID volume appears to be working well with no errors when I try to save or copy data to or from it.
Thanks in advance!