Would you be able to give me more information so I can try to help! Are you on Windows or Mac? By not working are you unable to install the app? open the app? Or are your controllers not working?
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Thanks for getting back to me! So as far as I can tell switch controllers (Pro & Joy-con) don't support vibration outside of the switch through Unity. So they will work like any other controller, just vibration will not. The 360 controller should be working however, but only through a USB connection. Unfortunately at this stage wireless isn't supported.
That's really strange, there is no reason for the 360 controller through USB to not work. Are you on Windows 10? I have heard of people having problems on operating systems such as Windows 7.
In saying that, there is a new update coming out soon that completely replaces the input system of this app and should hopefully fix a lot of these issues that you and others are having too!