When I am in the quest 'Mass Fusion' for the institute, I have been unable to continue due to the elevator glitching out. This happened when I teleported to the start of the building, killed everyone and started going down the elevator. After a fade to black, the screen begins to stutter and when I look up I can see the bottom of the elevator clipping out of the elevator I am travelling in. When I get to the bottom and a brotherhood power armour appears the doors do not open at all and once I finish killing it I am stuck. Also, when I try and skip this part of the game, when I get to the reactor and the quest is updated with 'retrieve the beryllium agitator' I get into the decontamination chamber and nothing happens. I just slowly die from the radiation exposure. Sorry for the long text, I have been having this problem for over a month now and it is really disrupting my progress since this is a main quest for the Institute. Can you please help?