Halo Reach Campaign

So I’m trying to go back and play my favorite Halo game, Halo Reach. Even though it’s mostly dead the campain is fun but sadly I can’t play the campaign. No matter what I do it says “Loading… 0%”. There is never an error message, it just always says 0%. Does anyone know how to fix this?

Are you playing off the disc or a digital copy?

“Mostly dead”
Not really, I can still pick games in the Standard Playlist, BTB and Coop playlist.