Just decided to start from my intermediary save before choosing railroad or Institute ending. Played until the nuclear option with no power armor on. (Figured no harm since this ending should be epic. ) teleport into the Institute to end my game and the Institute is empty. Wtf Bethesda?! I read about this bug after it happened and went to reload a prior save. ..as I have with many bugs in this game...only to find my previous manual and auto and quick saves were gone. Seriously now. ..what the hell. I can't even backtrack to the end of the last mission or any auto Saves besides one from 4 hours ago....it auto cleared everything right before I teleported in. So now my character can't leave the Institute or complete the mission. Thanks guys, glad I played cautiously for 7 days played time to get screwed like this. Sorry I can't help but be angry in this situation.