WOTC crashing when initiating certain actions

[KEPETZ]

i thought i'd ask on here in case someone might know what is causing this problem.
i just began playing War of the Chosen expansion for the first time (with various mods enabled), during the mission where you are introduced to the Lost for the first time, i attempted to have one of my characters hit a Lost with his sword. when he did so, the game crashed. i reloaded the game and reloaded the ironman save and repeated the attack and it crashed again. so i decided to just avoid doing melee for the time being. then i got to the follow up mission, and it crashed when the skirmisher used his justice ability. and again when the Lost attacked one of my soldiers.

does anyone have any idea what might be causing this?