Sharedpreferences Unhandled Exception: Null check operator used on a null value

You get this error because you are not binding sharedpreferences with flutter engine before the app runs.

To get rid of the error just simply put

WidgetsFlutterBinding.ensureInitialized();

before run(MyApp());

  Future<void> main() async {

    WidgetsFlutterBinding.ensureInitialized();
    var shared = await SharedPreferences.getInstance();

    runApp(const MyApp());
  }