1. Sometimes steam doesn't download new version of mods.
You should re-subscribe (if you didn't do it already, then you really have zero common sense and should read mod description first).
If that didn't help, then unsubscribe, delete the mod from your disk manually if steam does not do so. Mod can be found in: steamapps/workshop/content/1142710/2789864490

Once you have deleted it manually, subscribe again to re-download it.

2. Verify your game cache.

3. Try moving the mod file manually into your WARHAMMER III/data folder and see if that works.

4. It is also possible, that you ran out of RAM. I had this problem with WH2, if I launched the game with around 30% used RAM and on mid settings, during end turns or when opening some ui panel, game would crash. +the more mods I had installed, the more probable would be the crash.
With WH3 this problem has flown into unbelievable category (can only say about first launch). With 16 GB of RAM, if I had only VS Code opened, and had 21% used RAM, game would crash when loading into campaign. Though, it was very inconsistent. Sometimes, I could open a bunch of apps, and have 28% used RAM, and only then it would crash. Mind that, I had set lowest graphic settings.
I bought 64 GB of RAM and no longer have to deal with these issues. Though, I'm not eager to tinker with my PC settings to lower my RAM, so I could verify whether reports of crashes could be related to that.
If you get consistent crashes, try fresh campaign on lowest graphic settings on easy difficulty, so you can auto-resolve everything. And make sure there is nothing is running in background, no auto-startup apps and no 3rd party services (like virtual machine services, for example).

5. Subscribe to Script Debug Activator to print debug logs.
Logs are located in root game folder:
steamapps/common/Total War WARHAMMER III/script_log_020422_1137.txt
Search for "stack traceback", "error" to get an idea which mod is causing an issue.

If you find no errors but get weird behavior or CTD, then I need savefile and steps to reproduce (add as friend and PM me). If you have no idea how to reproduce the bug, then no point in reporting in the first place, as I don't even play the game and don't care personally.
Writing in comments is the most useless thing you can do. I couldn't care less if someone gets errors. I've seen enough of people who either thought that it was my mods that are the problem, yet they either claimed that have no other mods active at the time (and it turned out to be false) or didn't even try to re-subscribe, as was always stated in description. If you want ♥♥♥♥ get fixed, then you need to do something more, than just writing useless "reports" in the comments.