Failure to follow the correct load order is the #1 cause of game crashes. Use the following steps to ensure stability:
In the Total War Launcher, open the Mod Manager and check the box to allow "out of date" mods. total war attila mod medieval kingdoms 1212 ad campaign link
Tip: If using the UI sound replacement mod, it must be manually placed in your Total War Attila/data folder as it cannot be hosted on the Workshop. Failure to follow the correct load order is