That's not this case, I'm afraid. Several players reported that after returning and completing "heist" part of the chain they can not get further directions from Dodona (which is opener for Belsavis). As they find themselves outside and can not enter instance, and it turns red.
Well, at least that's how I got this problem, something about this mission was described in several threads recently.
sucks for you guys then since i just did the quest. All i had was the problem for finding the landing bad since the elevator was behind a red phase that wouldn't let me thought. Found out i had to go around to the other phase on the other entrance to the elevator to get to the landing. Everything after that was going according to plan.
Although i am experiencing a weird bug that doesn't allow me to see holo calls. Hear them speaking but no holo image.