Hello, I got to the first quest board and one of those quest for trolls tells me to go to www.thewithcer.com and log in as a forum user. Not only the log in and forums do not work, but I have already registered the game. How the hell do I get this quest?

Did you register the game through the launch menu?

If so just access the DLC tab and click on the troll quest, download it and then install it.