Could you try reinstalling/repairing the Visual C++ 2015 Redistributables please?
Vermintide 2 relies on the Visual C++ 2015 Redistributables, and a broken installation may result in an unstable experience.
Please uninstall the existing version of the Visual C++ 2015 Redistributables, reboot your PC and reinstall from the Microsoft website: https://www.microsoft.com/en-gb/download/details.aspx?id=48145
If an error is displayed claiming the redistributables cannot be installed as a newer version is already installed on the PC, please reinstall the Visual C++ 2017 Redistributables instead.