Extract the folder and run the .exe as Admin
are you using windows 10 and are updated in windows 10 to the latest build?
reboot (Restart), run steam, verify files
use eac set up here:
C:\Steam\steamapps\common\Warhammer Vermintide 2\installers\EasyAntiCheat
to uninstall and re-install
I have no other suggestions.
A full REBOOT/RESTART of windows generally removes the driver from memory.
I'm in the same boat as you =[
I also have the same problem, the rest of the trainer functions correctly. And you can use the "reset special cooldown" for a limited time but ultimately you will crash with that error after one minute of play time.