Larian Studios Forums Divinity 2 - Ego Draconis (English) Help/Tips/Tricks Chest won't open in Barnabus lair

I already killed Barnabus and I'm just cleaning up the area before I leave. One of the teleporters, green in color brings me to an area where I threw a switch to turn off the shield generator. In that same room there is a chest that cannot be opened with lockpicking. I can't seem to find a key or switch to open it.

This is not the teleporter room where the undead are with the key in the coffin. That area is cleared with everything opened.

Thanks..

Actually I've just played a visit there today, cleaned the place but the locked chest, already searched for every inch but no clue of any "key" found there.

P.S. there are also numerous locked chest I couldn't find any keys to open in broken valley map