Load the saved mission. Uses mods, but it hadn't been an issue to this point.

Sometimes the saved game will load properly, but then crash within about 5 second of being back in the mission. I've even managed to take a shot or two before the crash. Most of the time, though, when I try to reload the mission, it will crash before the save game completes loading. It's kind of a shame because I was really enjoying the mission!