Nvidia flex github page not found

https://github.com/NvPhysX/UnrealEngine/tree/FleX the link i got, page not found any help? and the integration…how do i do it, thx for the help.

You get this error when you are not logged into GitHub. Create an account (if not done so) and make sure you are logged in. Once logged in, it should work. Just tested, when I was logged out, 404 error…logged in, worked like a charm.