So I'm trying to get the True Dragonbane weapon. I have gathered all the collectibles and checked them for their symbols, I have figured out the order in which to stand on the pressure plates, but the door doesn't seem to open.
I think there might be some bug because I see a flash of the item pickup icon but it dissapears almost instantly after I finish the combination.
I am sure I am standing on the plates correctly, I could go through the effort of posting screenshots and video evidence but I'm not sure how active these forums are, so I'll keep it to this for now.
If there is anything else I can do please reply, or if you have had a similar problem.