Error 404 whengetting Nvidia PhysX?

When I go to the link:
I get a 404 Error.
My GitHub account is connected to my Epic Games account, and I am signed in on GitHub.
I have tried many things, including using the desktop version of GitHub, but I just get an error saying, failed to authenticate on GitHub. When I give my information, about a second passes and the error repeats.
Can anyone help?