[2020] I got an error saying Object reference not set to an instance of an object [System.NullReferenceException] Details: No details

Since Steam doesn't show you as owning the game, I'm gonna take a wild guess and assume you got it on Epic. In that case please update your video driver from the vendor's website.

IF that doesn't help also go here:
https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads
And run the x86 and x64 installers there.