I've made 2 mods (4 Seasons and Total War Eras). However when I try to play a custom battle both of them CTD after you select the factions you want to play as but before before you can select the units you want. When I used the *trace error log I found that M2TW checked all the small unit cards (the ones in the ui/units folder) of the first faction selected before crashing.

Does anyone know what is causing this crash or how to fix this?