failed to make pipe connection lock?
QUICK SOMEONE GET THE PLUMBER ON THE HORN
no but in all seriousness, when this shit happens restart steam, and if that fails, just wait an hour
basically the problem is that steam fails to connect to the servers randomly, could be an early timeout check or just a random client drop, steam goes nuts and goes "SHIT I CAN'T FIND THE DAMNED SERVER - DON'T START THE GAME, MAYBE THIS ACCOUNT DOESN'T REALLY OWN IT! STAY RIGHT THERE, YOU'RE NOT GOING ANYWHERE UNTIL I KNOW YOU ACTUALLY OWN THIS GAME SHIT SHIT SHIT"