"A given name is required ()" Error in OJS

I tried to upgrade OJS to latest version from ojs but it did not work. Unfortunately, I could not fix the issue so I had to run the back up. Fortunately, the back up worked. But I have been experiencing an error while trying to create a new reviewer or when trying to edit a user:
“A given name is required ()”
Error message appears and I’m not allowed to edit the user or create a new reviewer.
Can you please help or guide what went wrong and how to fix the issue.
There is nothing special in ojs error logs.

Dr Ahmad Bilal

I am also facing the same issue… If you find any solution for it. kindly help me