I've Added the Xbox Gamepad support to my UWP game, it works fine and all, but When doing the certification tests (after compiling the project), i get the "FAIL" result and the only problem comes from the files XboxGamepad.js.
The report, say that the encodage isn't good. It's in UTF-8 and should in in UTF-8 (with signature).
I've manually re-encoded the file to UTF-8 (with signature) myself and it solved the problem.