Best posts made by ThreeinoneJDD
Hey I just had this problem and was doing a lot of messing around to see if I could fix it and I managed to finish the quest.
So the movable boxes seem to have physics when they are moving, this gave me the idea to try something kinda dumb. I walked out and killed one of the people standing outside, picked up their body and dropped it at the box. The body broke the jar and physics bumped the box as it was falling, dropping it back into place and letting me move it again.
I hope this helps some people out!