I’m having the same issue on xbox 1x lock picked the inner weapon storage before i found the note, then found the note an key. Realised I had to use the key for the quest so travelled away from the area then ran back to find the power was off and outer door was lock and the power button no longer works.
I’ve tried this mission three times, once I managed to glitch my self into the wall. Could see all the corridors etc but couldn’t get back in. It also crashed twice. Think this area needs looking at.
I’m astounded that QA wasn’t done on these missions. This mission alone has 4 game breaking bugs that keep you from completing the mission, just for doing things out of order. This is QA 101 guys. Did they test AT ALL?