When I try to launch the first mission in the Halo:Reach campaign, after the loading screen a pop up saying “The UE4-MCC Game has crashed and will exit now” and “Fatal error!” shows up and then the game crashes. UPDATE: The game also crashes after loading a multiplayer match. So it’s basically unplayable.
Please see the pinned thread regarding Halo Support and how to submit tickets for issues you may be experiencing.