I’ve been trying to play Halo CE Coop with my friend, but whenever we try load into the campaign, I end up with a blackscreen whilst my friend loads in. When they finish loading in they get kicked to the menu, then I am shown the loading screen, until I completely load and am also kicked back to the menu.
Both our NAT connections are working, all game files verified, and we had been playing the COOP campaign without any issues before today.