Update:
The solution fixed the issue with OneDrive, but not Google Drive for some reason. I mean, I cannot even log my Gmail account on the Google Drive app (PC), although I could access the same account just fine on the web browser.
I started having this issue myself using KIS 21.3.10.391(k) only last week but with Google Drive and OneDrive. I shall see if Flood and Flood's wife's method will work in my case.