Hi, not sure why the mod wasn’t available for a while there - on the mod page, it said it was flagged and under review. Presumably someone clicked the report button?
I did some testing on 2: Consequences, and found the game didn’t crash if the coop player changed their team to Random in the lobby after joining.
No idea why this only affects a couple of levels, but it would be great if you could try that and let me know if that works for you too.
Edit: did some more testing and confirmed that these crashing levels are due to a rather obscure bug related to players being added and removed from the scenario over time. I’ve reported that bug here: Multiplayer scenario crash after adding and removing players
In the meantime, changing the coop player’s team to Random before hitting ready in the lobby seems to work around this issue.