Just had the exact same issue again - this time about 7 times in a row (just updated prior to this problem). But when I searched for a solution and it was trying to connect in the background, it suddenly worked as soon as I entered this thread. Maybe it's just a "Google's visit" that randomly keeps the login server busy or something? So far "retrying" did the trick for me - sometimes sooner, sometimes later. So, make sure you've got the latest version, as Kluelos stated, and then retry, retry, retry, retry, retry... hehe =)
