There is new "settings" app that gets installed when you install the apk. The icon has a checkbox for car and truck.
Open that app (Settings) and go to > Map Settings > Map Information to see if the maps are enabled are not.
Maps should be loaded automatically.

If the maps are present and enabled there and if you still can't see them on the map screen, then go to normal android settings and then apps, search for "garmin" and then select GOA app, then select "stop app".