After receiving the below Customer Support response:
As per the shared logs, The data in the volume is corrupt. you can backup the data, carry out a full factory reset (data destructive) and setup the unit again to see if the firmware can be updated successfully.
I decided to go over the Debian+OMV installation as discussed in https://community.wd.com/t/install-debian-on-wd-my-cloud-home/250061/22 section.
Now, I have a Deb10+OMV5 installed device in 10 mins and started to transfer my backups to the new setup. Everything seems working properly. I think, I don’t have to deal with the helpless Support once more till they can provide a better service instead of joggling with the useless messages.
I am happy now 
