That's an issue we've seen happen rarely with the side quests, something to do with our mark system that is supposed to put you back where you started when you finish it. Never had it happen on that one though, weird.
If you load a prior save you should be able to get past it no problem, we have a hard time replicating it but it does eventually decide to work right.
Not saying it's all Unity's fault. Most likely something you coded works for others and in a few cases fails due to circumstances wich may or may not be linked to Unity either alone or in cunjunction with whatever. If i thought it was all Unity failing me i'd not have told you i hope it may help.
I only pointed my past issues with Unity for if you ever want to look down that path...
Managed to get past that point in the game anyway, and that's what currently matters to me. ^^
