When doing the second to last quest for the Brotherhood of Steel, "Ad Victoriam", it does not allow me to preform the action of plugging in the beryllium agitator. Which makes it impossible to continue the quest or ending the game with the BOS. After speaking to Proctor Ingrim, she says to plug the beryllium agitator into liberty prime, a location marker then goes to the back of liberty prime. I proceed up to the marker and it doesn't prompt any action, where my game hits a brick wall. Ive reloded it 10+ times and done it different ways, trying every little thing from wearing power armor or not, to doing "Banished from the institute" or not with no results. I havnt found anything else about anyone else experiencing this problem. This is the only ending I havnt completed, please help.