I'm having the same problem with the Seer's Solace quest as well. I am unable to progress, and I refuse to restart the game and lose the hours I've spent exploring and doing side missions. It's completely unacceptable to release a game that is this broken and unplayable at launch. I've had a ticket up since Tuesday without any response from Ubisoft. I'm about ready to return this game. This is the last time I buy a ubisoft game at launch if this is what you call an acceptable response to a major game breaking bug. You need to do something to make it up to your many consumers who preordered this game expecting it to be playable at launch