Stuck in the aqua regia room, how do I get out?

[655321]

Hi all! recently purchased the game and gotta say its a piece of art, one of the best atmospheres I have experienced in my life. I have a problem though, when you have to get the chemicals to mix the acid, I found the aqua regia chemical and for some reason, now I can't get out of the room, the door doesn't say anything like "it won budge" or "door locked" It just moves but does not open.

I have check tons of walktroughs and they just say: "grab the aqua regia, read wilhem's letter and exit the room" so I assume there is no puzzle to solve here, but I have no idea why I am unable to exit this room

Any help?

PS: for a more specific description of which room is it, its the one in the wine cellar where alexander locks willhem and his men and they all die from weird things, in this same room you get the aqua regia chemical, there is a window, 2 paintings and blood on the floor and walls, also there is substance just like the one you have to follow when you start the game.