I'm also getting, "authenticity key invalid or expired. engine start aborted". Since I made my $50 purchase I have never been able to play. Is there another option to fix this besides rolling my system clock back and if so can you please help?

Currently we have the servers inaccessible to players until we are finished testing the next major update.

Damnit! He beat me to it. Shouldn't you be sleeping?

Here this has more information on the current status if you wish to read it