One of the DLLs required to launch Vermintide 2 is missing.
Firstly, please run the Windows System File Checker by:
- Launch the ‘Command Prompt’ as an administrator
- If prompted for an administrator password or confirmation, enter the password or select ‘Allow’
- Enter the command:
sfc /scannow - Restart your PC once complete
Try launching Vermintide 2 afterwards.
If the problem persists, please launch the ‘vermintide2’ executable located within the binaries, here: C:\Program Files (x86)\Steam\steamapps\common\Warhammer Vermintide 2\binaries
On doing so, an error should be displayed referencing which particular DLL is missing. Please let us know what this error says.