Hello! 
Sorry to see you’re having this issue.
This could be related to an outdated GPU driver. Head into your PC’s settings and make sure your drivers are up to date. While you’re there, make sure Windows is updated to the latest version too.
It could also be caused by antivirus interference or corrupted .NET Framework software. Instructions for resolving those can be found here: I can’t Install WeMod / "There was a error installing the application" - #2 by Ravenfyre.