I did the Sword Dance mission and it wouldn't let me open the chest, I traveled back to the area and I had to do it again (I've done it a total of 5 times and nothing) now the chest that has to give me a fragment doesn't appear prismatic and I can't continue playing the following quests because I have it bugged. I hope they solve the problem because if not I will be in a position to return all the DLC and not play again, very upset. I need to know how to fixed and now.