Playlist crashes again

I’m trying to continue my Halo Reach LASO run and when I try to load up Long night of solace, my screen goes right and my game kicks me back to the menu. I had this issue when playing the legendary playlist but I have no idea how I fixes the issue. There is no way I’m starting the LASO playlist again because of a stupid bug. There must be another work around?

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> I’m trying to continue my Halo Reach LASO run and when I try to load up Long night of solace, my screen goes right and my game kicks me back to the menu. I had this issue when playing the legendary playlist but I have no idea how I fixes the issue. There is no way I’m starting the LASO playlist again because of a stupid bug. There must be another work around?

I’ve found a fix to this problem. I loaded up the glitched mission in coop and that resets all the checkpoints of that level. It removed the corrupted one on Long night of solace and when I quit the game and started it solo. It was fine and I could continue the game.