Have been trying to do this mission on Challenging mode since last night for the 30 Phoenix credits, and every time I try to play it, the mission won't start. The gate remains closed. It doesn't matter if I try to play with a group, or a bunch of randos. Not sure if this is strictly an Xbox One issue or what, but this **** gets old after a while. I have NEVER seen a game more f'ed up from the door than this one. This is easily one of the most embarrassing games ever released.