Larian Studios Forums Divinity 2 - Ego Draconis (English) Help/Tips/Tricks Grave Robbers IMPOSSIBLE

Hi guys, new to the forum but been playing D2 on Xbox 360. Right, ISSUES! Grave Robbers quest, I've found everybody EXCEPT the guy I know is down the Imp's Lair. Now, he's behind a locked door in this lair and in my game there is no key what so ever to open this door, and I have actually wasted hours of my life scaling the room and other places looking for it.

On maps it says theres a "Gregor Chest" on a peninsula near the exit to Rivertown Gorge, this chest also doesn't exist in my game, where I thought there might be a key.

Anyone else had this issue? I gave up in the end and went into the hall of echoes, so now I can't even continue the quest but I wanna know cuz it DROVE ME APE!!!!

Cheers guys, and many apologies if this has been answered before, I did look at 6 pages worth of topics and couldn't find anything so I tried

theres some imp mage or else who drops the key i think ... the imp is just right before that door...
if tehres no bag or something like that i dunno either

Yeah theres just nothing there, theres imps behind that locked door and a green dot. I'm wondering if its one of those "should have just done it there and then" as opposed to "I have to run away cuz im gonna die", cuz I think whatever box or imp had a key is now long gone. So I think... GLITCH!!!!