Flutter Can'；不要读取提供者数据，尽管它存在于Ancessor小部件中。颤振

我刚开始使用flatter的Provider包，我了解到我们必须在父类中提供Provider，这就是我们所做的。但我仍然得到这个错误。我觉得这和路线生成器有关。非常感谢您的帮助

我的主要应用程序代码：

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  final MaterialColor primary =
      MaterialColor(0xff1A365D, <int, Color>{500: Color(0xff1A365D)});
  @override
  Widget build(BuildContext context) {
    return ChangeNotifierProvider(
      create: (_) => AuthInfoProvider(),
      child: MaterialApp(
        title: 'xxx',
        debugShowCheckedModeBanner: false,
        theme: ThemeData(
            // This is the theme of your application.
            //
            // Try running your application with "flutter run". You'll see the
            // application has a blue toolbar. Then, without quitting the app, try
            // changing the primarySwatch below to Colors.green and then invoke
            // "hot reload" (press "r" in the console where you ran "flutter run",
            // or simply save your changes to "hot reload" in a Flutter IDE).
            // Notice that the counter didn't reset back to zero; the application
            // is not restarted.
            primaryColor: Color(0xff1A365D),
            accentColor: Color(0xff4299E1),
            buttonColor: Color(0xff1A365D),
            floatingActionButtonTheme: FloatingActionButtonThemeData(
                backgroundColor: Color(0xff1A365D))),
        onGenerateRoute: RouteGenerator.generateRoute,
        initialRoute: '/auth/wrapper',
      ),
    );
  }
}

我得到的错误是：

我是提供商的新手，如何解决此问题。非常感谢您的帮助

class RouteGenerator {
  static Route<dynamic> generateRoute(RouteSettings settings) {
    final args = settings.arguments;

    switch (settings.name) {
      case '/auth/wrapper':
        return MaterialPageRoute(builder: (_) => AuthWrapper());
      case '/auth/wrapper/login':
        return MaterialPageRoute(builder: (_) => Login());
      case '/app/activeevents':
        return MaterialPageRoute(builder: (_) => PaginatedActiveEvents());
      default:
        return MaterialPageRoute(builder: (_) => ErrorRoute());
    }
  }
}

class AuthWrapper extends StatelessWidget {
  const AuthWrapper({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    final authInfo = Provider.of<AuthInfo>(context);
    return authInfo.isFirst ? Landing() : Signup();
  }
}

class AuthInfoProvider with ChangeNotifier {
  AuthInfo _authInfo = new AuthInfo();

  AuthInfo get authInfo => _authInfo;

  void setIsFirst() {
    _authInfo.isFirst = false;
    notifyListeners();
  }
}