If you use a PTC account, can you log in through the website? That's the first thing I'd check to see if it's something local or not.
Yeah, attempting to sign in to PTC gives me the same Humbled Server message.
Maybe the update was to lock Iceland out!
EDIT: OK this is really weird. I still can't connect through Google. I
can through PTC, but it starts me at the very beginning.
I have reinstalled the game, updated every Google-related app I have, and have deleted all traces of my second Google account from my phone. The servers are fine. There's people out there right now playing this game with wild abandon but I can't pick up where I left off.
Any ideas would be much appreciated.
EDIT OF EDIT: The only solution I have found that can be replicated is to first sign in through the PTC, sign out, then sign in again via Google. No idea why this happens but I'd be very interested to know, if anyone can shed some light on this.