This is an error produced by our anti-cheat service, Easy Anti-Cheat.

I have queried this particular error with them in the past; please see their response below:

This error is usually triggered by these softwares: ByteFence, Reason Core Security, Webroot SecureAnywhere.
Only disabling it will not be enough, it is necessary to uninstall it, cold reboot the PC and repair the service.

That’s odd. Could you try a ‘Selective Startup’ by:

1. Press the Windows key
2. Type ‘msconfig’ and select ‘System Configuration’
3. On the ‘General’ tab, select ‘Selective Startup’
4. Deselect ‘Load startup Items’
5. Reboot your PC
6. Launch Vermintide 2 as normal, and see if the issue persists