Simular issue here. When I am logged in at Google by Chrome webbrowser and then start up Weekplan I can not log in by my google account. I have to log out from google, log in at Weekplan and then log in at Google again. Strange! Suspect problem identifying multiple google accounts?
Does it work if you retry about 6 times? I know it sounds silly but another user has reported a similar issue and I want to find a pattern in this issue.
Suspect problem identifying multiple google accounts?