I am stuck in the same spot as you. I tried loading back a few minutes and doing the conversation again, but nothing changes. I tried answering differently, but it still gets stuck. Basically, I make one of the two choices and afterwards the quest still says that I have to talk to them and everyone just stays there... After I talk to them once again, I just get what you have on your screenshot. I really don't want to load an hour back and have to do all of the trials again, so I guess I can't continue playing...
