So, apparently Petra Venj gives you a quest to start House of Wolves. When I talk to her, no missions of any kind appear. I bought this expansion and can't do anything with it. I've tried all kinds of restarting my console, but still nothing. My brother who shares the console, with a different account, was able to play missions by being invited by a friend, but still can't see anything on his side. What can I do?