I had exactly the same problem, and I figured out what was crashing my version which is also the steam version using both mods as well. I registered to this site just to tell you haha
My problem was that I had the "No Funkers" mod turned on. The mod makes it so that only people who go on the mission get promoted. After I turned this off it didn't crash for me anymore, I had the exact same crash message as you did as well.