show app button not working

[N246]

In home screen setting the app button does not work. I select show app button but the app button does not appear on the home screen. I've enabled it over & over but it does not work. I don't want to swipe up from the home screen & prefer a button to take me to all the apps. This was showing before but since clearing the data on the home screen & setting it up from scratch this button does not work. Does anyone have any ideas for a solution?