The trainer is in need of an update, as you can see from posts in the official thread for the trainer here: https://community.wemod.com/t/total-war-warhammer-cheats-and-trainer-for-steam/. The current trainer was made by someone who no longer works for WeMod, so it is very likely to be out of date.
Here is how to request an update for trainers: https://support.wemod.com/article/43-how-do-i-request-an-update-for-games