I have tried all of the fixes I can find on many different sites.
-leaving off @gmail.com
-trying
xxxxxx@google.mail.com
-resetting gmail password online
-using old passwords
-typing in the word "null" as the password
-having someone else call and hitting the back button after answering
-repeatedly opening and closing phone while hitting any multitude of buttons (there are a bunch of theories on this one)
-flipping off the computer screen with BOTH hands
Nothing. I think I'm going to have to try a factory reset. I just can't believe that this is a known bug that has been around for 8 months plus and it is still happening to people.
It blows goats, I tell you.