How To: Stop Warhammer: Vermintide 2 Launcher From Crashing
/To solve it, you need to install the .NET installation you have of 4.7.1 and 4.5.2, after this you need to install 4.5.2 again and that should repair your issue.
You can find .NET runtime 4.5.2 here:
https://www.microsoft.com/net/download/dotnet-framework-runtime/net452