We are trying to figure this out, because it's working on our side - it works with keyboard (one & two players, with no pad connected) and PS4 controllers.
We will upload a version in which the log will be more verbose, ask you to run it (sorry!) and see what logs say.
It's the first time we use the new Unity's input system - which is still in preview - and maybe we are doing something wrong that prevents the game from working on some PC configurations!