I have joined half a dozen LFG’s for this dungeon and no one can start it and nothing is attackable and you can’t talk the guy that is there in the mythic version, that offers to port you into the city. Halp?
are you doing it as a keystone or a regular mythic dungeon?
In both keystone and normal mythic if you approach the guards at the front gate they will have some dialog then become attackable
EDIT:
I just ran this in LFG and it appears to be working correctly. Just approach the gaurds at the front gate and they become attackable