我在使用Flutter + dart构建的网页中添加了本地化支持。我可以看到使用www.example.com属性可以正确显示标题S.current.name，但是当构建到小部件时，它失败了，并出现以下错误：

Assertion failed: file:///C:/dev/Adri/lib/generated/l10n.dart:21:12
_current != null
"No instance of S was loaded. Try to initialize the S delegate before accessing S.current."

我的main()和HomePage看起来像这样：

void main() {
  runApp(const HomeScreen());
}

class HomeScreen extends StatelessWidget {
  const HomeScreen({super.key});

  @override
  Widget build(BuildContext context) {
    return ChangeNotifierProvider<LanguageChangeProvider>(
      create: (context) => LanguageChangeProvider(),
      child: Builder(
        builder: (context) => MaterialApp(
            debugShowCheckedModeBanner: false,
            locale: Provider.of<LanguageChangeProvider>(context, listen: true)
                .currentLocale,
            localizationsDelegates: const [
              S.delegate,
              GlobalMaterialLocalizations.delegate,
              GlobalWidgetsLocalizations.delegate,
              GlobalCupertinoLocalizations.delegate
            ],
            supportedLocales: S.delegate.supportedLocales,
            //title: S.current.name,
            home: MyHomePage(title: S.current.name,)),
      ),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});
  
  final String title;

  @override
  State<StatefulWidget> createState() => _MyHomePageState();
}

正如您所看到的，S.current.name可以成功地作为网站的标题传递下去：

但似乎HomeScreen的其余部分由于某种原因无法访问此S：

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          actions: [
            IconButton(
                tooltip: SELECT_LANG_HU,
                onPressed: () {
                  languageChangeProcess(context, LOCALE_HU);
                },
                icon: const Icon(Icons.language)),
            IconButton(
                tooltip: SELECT_LANG_EN,
                onPressed: () {
                  languageChangeProcess(context, LOCALE_EN);
                },
                icon: const Icon(Icons.change_circle))
          ],
          iconTheme: const IconThemeData(color: Colors.grey),
          title: Text(
            S.current.name,
            style: TextStyle(color: Colors.grey.shade600),
          ),
          flexibleSpace: Container(
            decoration: BoxDecoration(
                gradient: LinearGradient(colors: <Color>[
              Colors.teal.shade50,
              Colors.teal.shade100,
            ])),
          ),
        ),
        body: Row(
          children: [Expanded(flex: 1, child: Container())],
        ),
        drawer: Drawer(
          child: ListView(
            children: [
              DrawerHeader(
                  decoration: BoxDecoration(
                      gradient: LinearGradient(colors: <Color>[
                    Colors.teal.shade50,
                    Colors.teal.shade100
                  ])),
                  padding:
                      const EdgeInsets.only(left: 2.0, right: 2.0, top: 4.0),
                  child: const ContactCard()),
              MenuElement(Icons.person, S.current.introduction, () => {}),
              MenuElement(Icons.school, S.current.education, () => {}),
              MenuElement(
                  Icons.workspace_premium, S.current.publications, () => {}),
              MenuElement(Icons.work, S.current.workExperience, () => {}),
            ],
          ),
        ));
  }

我是不是漏掉了什么明显的东西？
在pubsec.yaml中，我添加了以下依赖项：

flutter_localizations:
    sdk: flutter
  provider: ^5.0.0