Google Hangout Authentication Error

For the past two weeks my group has been unable to launch the roll20 through a hangout, saying that there was a token authentication error. All of us are having the same error.

Also, Can you try using this link: <a href="https://security.google.com/settings/security/permissions?pli=1" rel="nofollow">https://security.google.com/settings/security/permissions?pli=1</a> and finding the Roll20 app and Clicking Revoke Access. Then try launching Roll20 again in the Hangout and you should get prompted to re-authorize Roll20 again. It's possible something is corrupt with the OUATH token in your G+ Profile.