CITADEL DLC GAME STOPPING BUG

Hi,

Have encountered consistently, on PC, in the Citadel DLC of Mass Effect 3, at the beginning of the Archives level, a BUG causing a progression-stopper. Right at the beginning of the level (in a square room with an access on the sides and in the middle, with one weapon upgrade and a medi-gel dispenser), the door on the opposite side where the player is supposed to progress through is open but there is nothing behind except for dark background textures. When trying to go through the threshold of the door after dispatching the enemies, Shepard simply falls for a few seconds, while the game tries to load, then the player is brought back to the center of the previous room, with the same door with nothing behind.

I have tried re-loading the checkpoints a dozen times, restarting the mission (with different squadmates),  tried a previous save(before starting the dlc). Issue occurs all the time, a new game, different class, uninstalling and reinstalling the entire game and dlc with NO CHANGE. THE BUG ALL WAYS OCCURS AT THE SAME PLACE.