[2021] Vermintide 2 stops responding when joining or starting game

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: Download Visual C++ Redistributable for Visual Studio 2015 from Official Microsoft Download Center

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.