I was having this same problem using 4.14. I tried updating and reinstalling all my drivers as well as various xinput settings but nothing worked. Eventually when I tried installing 4.15 the Xbox One controller began working. However, I have just tried it again in 4.15 and it is no longer working. Nothing on my system has changed, which makes me think that this is most likely a bug with the 4.14/4.15 editor. On running the console command show debug input I can see that no input is received from the gamepad.
If you have any luck with finding a solution please let me know, likewise I will do the same.