Error R-1603

I downloaded the epic games launcher from the Shadow Complex PC page, I installed it, I launched it, it updates, and then it tries to install prerequisites and fails with that error after a while. I never actually see the Epic Games Launcher get past that and actually launch.

I tried the .net repair tool and the MSI tool that fixes the update registration corruption, but that still didn’t fix the launcher.I’ll try reinstalling the .net versions later when I reboot my PC, since they won’t fully uninstall unless I do so.