You marked the file as windows, mac and linux. But I think your file cant do that (Im just assuming so I might be totally wrong here. If I am please tell me how you made a file for all 3 platforms). I guess its just a windows file, since its a .exe If you're using Unity, you have to change what your building for. One of these options is for windows linux and mac, but in that option you can still pick which one of these 3 your building for.