Why can't I manually make the Varjo plugin work for Unreal 5.1?

Varjo plugin does not work in Unreal 5.1.

You need to have Microsoft Visual Studio installed and set up on your PC in order to compile the plugin into the project.

Follow this manual on how to set up MS Visual Studio:

https://docs.unrealengine.com/5.1/en-US/setting-up-visual-studio-development-environment-for-cplusplus-projects-in-unreal-engine/

Follow this manual on how to set up the Varjo plugin:

https://developer.varjo.com/docs/unreal/ue5/unreal5-plugin-manual-install