Why does my Garmin map not display when I select it from Activities and Apps?

Just bought a Garnin Forerunner 55. Using the Up/Down buttons, when I select Activities and Apps, then hit the Start/Stop button, all I get is the map name, i.e. Maps4 Garmin but nothing shows anywhere. The only display that ever shows properly is the Watch Face. Can anyone kindly guide me to get a map to display?