I and another friend completed Richtofen's side of the EE and got the achievement just fine. But when we try to do it again with 2 other friends who haven't completed it, it won't work. The Navcard machine/table is built when go into the game, but we can't trigger any of the other steps. The tower is lit up blue and I think that means Richtofen's side is complete, but why would it be for them. I've also tried having them host, still same issue.
How can I get it reset so I can get it done for them?