Yeah so I seem to be the first to point this out but when you have to find Virgil to help get into the institute its always bugged. I get as far as his cave and according to the walkthrough you ignore the turrets as their meant to be inactive and you just go talk to Virgil. In my case however all the defences were active and engaged me which permanently made Virgil hostile towards me and I can't start dialogue with him to progress the mission. Previous saves don't work either. I'm considering going back 2 and half hours in game time to my only other save before I started the mission to try and fix it but would rather avoid that. Anyone else have this issue?

Need help with this also having the same issue. Someone please help.

Okay so finally got past this buggy bit! Here's what I did. Go alone or leave companions behind! I had paladin Danse with me at the time and since brotherhood of steel hate mutants and such he went Agro for some reason. Also do not shoot your weapon inside the cave or have it drawn for that matter, worked for me. Not sure what caused the bull [censored]tery before but at least i got past it. So yeah avoid companions here and don't shoot