FluentUI ProgressRing wrong way

main.dart

import 'package:fluent_ui/fluent_ui.dart';

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

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

  @override
  Widget build(BuildContext context) {
    return FluentApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        brightness: Brightness.light,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return const ScaffoldPage(
      content: Center(
        child: ProgressRing(),
      ),
    );
  }
}