[2021] Crash when starting the game

Your installation is incomplete/corrupted - have you tried the Verify Integrity of Game Files option?:

1. Right-click Vermintide 2 in your Steam library sidebar
2. Select ‘Properties’
3. Select the ‘Local Files’ tab
4. Select the ‘Verify the Integrity of Game Files’ button. This may take several minutes
5. When complete, close and reopen Steam
6. Launch Vermintide 2 as normal