Halo 3 campaign. "players failed to load content"?

Cant start the campaign. Looking for suggestions other than disc cleaning. Same problem With Reach’s campaign

I had the same problem with my first copy of halo 3 it turns out there was laser burn on the disc. so u might have laser burns on disc, i could not find away to fix them so i end up buy anther copy

I had the same problem with my first Halo Reach copy. Mine problem was laser burns.
The Dnend Legion

i don´t play Halo 3, no on 360.