You will want to start by making sure that your game is set up correctly. Go into the Games page and click on the correct game to open the settings.
First, make sure that the Schedule is set to start and end at the correct time, as a Score will only be recorded if a game is Active.
Second, if it is a Classic game, make sure that you have entered goals for each of the Trackables selected for the game. The Scoreboard needs Goals to register products.
Then, click on the Roster tab and make sure a team/teams or players are assigned to the game.
Finally, be sure that Players are logging in as themselves. If they are logged in under an Admin's email, for example, the Scores will not be attached to the correct name.