Hello Mrs. Beasley,
You may need to clear your browser cookies if the issue persists. Typically, when you reach the login page we generate a token that is valid for up to 5 minutes. If you haven't logged in by this time, and then proceed to login in with Google, you will get this error. In some circumstances, the cookie with the token won't expire (it may depend on your browser settings), and so you may continue getting the error even after attempting a second login.
Regards,
Evan