im at the mission after Cerberus steals the protean artifact from thessia  the mission in which miranda is involved 
 
my waypoint is to go to the sanctuary but both doors are locked, one is being fucked with by a banshee, and the other one is red and it cant be open 
 
i hope thats enough detail of where i am, hope it helps, and if im an idiot then im a idiot

yep fuck it looking at a guide, the game literally glitched and locked me out,