App Usage Access not responding

Hi.  I am trying to install Norton Family on my child's Acer Z320 Android smartphone.  When it reaches the "Required Settings" screen, it asks to turn on the App Usage Access for Norton Family and sends me to the appropriate tab in the phone's Settings App.  When I toggle Norton Family to "On" it does nothing - setup freezes.   I checked in the phones setting tab under Apps with Usage Access and Norton Family is still on.  The Device Administrator for this app is also activated and the the Norton Family Accessibility Service is On.  Please help.  Thank you.

Les