I have the same problem - I'll try to get screenshot but in the meantime it happens once you have discovered where Sven's hideout is (so after you come back from getting the book from the monastery in Ireland). I got to it, did not attack straight away and went in to talk to them, paid the money for the slave then left. Got into a chat with Brunhyld then decided to attack Sven's hideout to see what would happen. Won the battle and then I get into a conversation with Bodo with two choices one is (I can't remember exact word) - "listen to Bodo and clean camp" or "burn camp down" - no matter what I choose it gets stuck at that point in a loop.
