I've installed Nova Launcher on an old phone (1st Gen MotoX). I'm trying to child-proof it by disabling most of the default apps and clearing the home screens with nothing that a child shouldn't be getting into. After updating some Nova Settings, going back to home screen rendered the App Drawer icon missing (the one in the middle of the dock at the bottom of the screen).
Interested in a fix and how to prevent this from happening in the future.