This has happened so many times now that I'm considering just quitting and maybe coming back in a few months. I will start a mission by unlocking the desired difficulty on the map, join a group or go there myself, but the doors won't open making it impossible to start the mission. Is there something we're doing wrong? This happens when I join a group, when I'm the leader, or if I want to go at it alone. So frustratingly annoying..

