"Cannot set URL path strategy more than once"

[nyck33]

I'm using this with Riverpod so I do in void main:

runApp(
    ProviderScope(
      child: MaterialApp(  //the relevent error causing widget it says here line 98
        debugShowCheckedModeBanner: false,
        title: 'Myapp Mobile and Web',
        home: MyApp(
          ///dummyUser and loggedOut or userSP and loggedIn
          user: mainUser,
          appBarState: _appBarState,
          sideBarState: _sideBarState,
          loginStatus: loginStatus, //dont' need
          sessionValid: sessionValid,
        ),
      ),
    ),
  );

Then MyApp is like:

class MyApp extends ConsumerStatefulWidget {
  final UserSharedPrefs user;
  final AppBarState appBarState;
  final SideBarState sideBarState;
  final LoginStatus loginStatus;
  //session was loaded from SP
  final bool sessionValid;

  const MyApp(
      {Key? key,
      required this.user,
      required this.appBarState,
      required this.sideBarState,
      required this.loginStatus,
      required this.sessionValid})
      : super(key: key);

  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends ConsumerState<MyApp> {
  UserSharedPrefs get _user => widget.user;
  AppBarState get _appBarState => widget.appBarState;
  SideBarState get _sideBarState => widget.sideBarState;
  LoginStatus get loginStatus => widget.loginStatus;
  bool get sessionValid => widget.sessionValid;
  //late final _sessionValid;

  //SideBarState initialSideBarState = SideBarState();

  @override
  void initState() {
    // TODO: implement initState
    //_sessionValid = ref.watch(userProvider.notifier).userService.init();

    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    /*
    final userProviderState = ref.watch(userProvider);
    final sidebarProviderState = ref.watch(sideBarProvider);
    final appBarProviderState = ref.watch(appBarProvider);
    final userNotifierProvider = ref.watch(userProvider.notifier);
    final sidebarNotifierProvider = ref.watch(sideBarProvider.notifier);
    final appbarNotifierProvider = ref.watch(appBarProvider.notifier);
    //initialize Storage in each controller
    userNotifierProvider.initializeStorage();
    sidebarNotifierProvider.initializeStorage();
    appbarNotifierProvider.initializeStorage();
    //set state loaded from Storage
    userNotifierProvider.initializeUser(_user);
    sidebarNotifierProvider.initializeSideBarState(_sideBarState);
    appbarNotifierProvider.initializeAppBarState(_appBarState);
*/
    return MaterialApp.router(
        routeInformationParser: _router.routeInformationParser,
        routerDelegate: _router.routerDelegate,
        title: 'SmartPMS X');
  }

  //userSharedPrefs dummyUser has loginStatus loggedIn
  final _router = GoRouter(
    initialLocation: pathZeroMap[PathsZero.home]!,
    routes: [
      GoRoute(
        path: pathZeroMap[PathsZero.home]!,
        pageBuilder: (context, state) => MaterialPage<void>(
          key: state.pageKey,
          child: MyHomePage(title: 'SmartPMS X'),
        ),
      ),
      GoRoute(
        path: '/login',
        pageBuilder: (context, state) => MaterialPage<void>(
          key: state.pageKey,
          child: LoginScreen(),
        ),
      ),
      //TODO sub_routes and other routes here
    ],
    errorPageBuilder: (context, state) => MaterialPage<void>(
      key: state.pageKey,
      child: ErrorPage(state.error),
    ),
    urlPathStrategy: UrlPathStrategy.path,  //set here
    debugLogDiagnostics: true,
  );

Where am I setting it twice?

[csells]

You're creating two instances of MaterialApp. The first one sets the URL path strategy for the app and then the second tries to do the same, which is causing the error.