Right now you are standing near the open door. Just exit the room from the open door and move forward through the corridor passing through the portrait on you are right side until where you can see a steps on you are left side. Just climb the three steps and make a slight right turn in front you can see a open door just step into that open door and move forward and make a slight left turn where you can see a rest room, just get into that room through the open door. Here we reached our destination near the open door.