Forum:"Talk to Tannis" mission

Ok, so i beat the first run through and upon returning it told me to go to the Crimson Fastness and "Talk to Tannis" because she had to tinker with my ECHO system. I went to the way point and it led me to an empty cell, and said I had talked to her. Now I have to turn in and its in the cell but the door is closed. Anyone know why this happened? Just curious... And I'm sick of going into my mission screen and it showing me to turn in for a mission that I have no clue as to what it is.