Is it possible that it has something to do with what equipment gets recovered/doesn't get recovered from a dead soldier? I tried it multiple times, on an installation with CE and Xtended backgrounds fused in (as well as skitso maps i forgot to uninstall), with just Xtended, and with only this mod and every time it only crashed at the end of a mission when a soldier died. Even having soldiers "die" in the mission but get recovered with 1 health after the end let me continue to the geoscape.