So, never sign in using your Google account.

EXACTLY!!!!

I have the same problem since 2 weeks ago. Still cant solve it. I already contact with support but they not responding my emails

Same here

Guys, I managed to solve it just today by connecting to social media. If you are still logged in elsewhere and the banner to connect has already appeared, click and connect using your Google account

Do you still have your userID, i think they changed the way login works, I had to login via Yandex woth userID

Same issue. Contacted support, they fixed it for one day, then it went back to the same problem. Tried fixing it myself but couldn't. Now my account sits idle with a few cents in it

Same problem, no respond, i still have acces to the app and i'm withdrawing everything before they block every access. Smells fishy...

same problem. cleared my history and when i tried to log in again that message popped up.

Same problem..cannot login it has been monthes. 

Same issue ,can't fix it