@codinghorror After Impersonating the user account these are the errors I got in console logs pressing F12
Right after logging into the user account and then logged in as admin and I tried website.com/logs
And this I got.
@Johani I tired unlinking the google linked account, but there has to be atleast 1 account not all can be removed, either I can change the associate email address or add another one as primary and remove previous one, so I have changed the email address manually and tried, but the blank white screen is still there.