使用Provider时出现Flutter 'No Overlay widget above‘错误

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Overlay(
      initialEntries: [
        OverlayEntry(builder: (context) => MyOverlayWidget()),
      ],
      child: MaterialApp(
        // 应用程序的其他配置
      ),
    );
  }
}

class MyOverlayWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return OverlayEntry(
      builder: (context) => MyWidget(),
    );
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final overlay = Overlay.of(context);
    overlay.insert(OverlayEntry(builder: (context) => MyContentWidget()));
    // 其他部件的构建
  }
}