Whenever I try to load into a campaign game into a friends game it won’t load at all for both of us and either kicks us back into the main menu or straight-up crash the game itself. If anyone knows a fix please help us.
Me and my friend have experienced a similar issue with ever mission, except Cairo Station, have failed to load, making it impossible to play through the campaign with online co-op. So far I haven’t found any fixes so I guess we’ll just need to wait for them to make the game work.
Found this older forum post, might help you, haven’t tried it myself yet though https://www.halowaypoint.com/en-us/forums/84ad72a8b51847978545f685f651fc15/topics/halo-mcc-co-op-fix/ed174f3c-dbc0-4722-8083-37ce87fa9d4f/posts
Both players need to set their Graphic’s setting to “performance mode” before starting the mission. Don’t ask why this works i’m still mad about it.