I too am getting this message at startup. The only difference is that I just pre-ordered the game so I have not actually run the game successfully yet. I hope the fix is easy because I would love to try this game out it looks very cool.
After looking through this thread viewtopic.php?f=21&t=2537 it looks like the changing the current time to before 8:00pm Aug 31 fixes the issue and allows the game to start.
I have the same problem too. I got it to work this morning by changing the clock to August 30th (same time of day). I’m using Windows Vista 64 if that makes a difference.
Edit: Whoops, sorry, didn’t notice it was already slated as fixed for the next release on the sticky.
It looks like the issue is popping up again for me. I tried changing my date time to see if that would fix it but alas it did not. I can confirm that once the patch went out I had not troubles starting the game. I gave it a break for the day while I went to school/work came home and the issue started up again.