Reactjs 错误未捕获的错误：[App] 不是 组件. 的所有子组件必须是 或

我第一次try 使用路径，并严格按照YouTube上的说明进行操作

App.jsx

import React, { Component } from "react";
import { Route, Routes } from "react-router-dom";
import "./App.css";
import Customer from "./components/customer";
import Movies from "./components/moviesComponent";
import NotFound from "./components/not-found";
import Rentals from "./components/rentals";

class App extends Component {
  render() {
    return (
      <Routes>
        <Route path="/movies" element={<Movies />}></Route>
        <Route path="/rentals" element={<Rentals />}></Route>
        <Route path="/customers" element={<Customer />}></Route>
        <Route path="/not-found" element={<NotFound />}></Route>
      </Routes>
    );
  }
}

export default App;

Index.js

import React from "react";
import ReactDOM from "react-dom/client";
import "./index.css";
import App from "./App";
import reportWebVitals from "./reportWebVitals";
import "bootstrap/dist/css/bootstrap.css";
import "font-awesome/css/font-awesome.css";
import "hover.css";
import "./App.css";
import { BrowserRouter, Routes } from "react-router-dom";

const root = ReactDOM.createRoot(document.getElementById("root"));
root.render(
  <BrowserRouter>
    <Routes>
      <App />
    </Routes>
  </BrowserRouter>
);

// If you want to start measuring performance in your app, pass a function
// to log results (for example: reportWebVitals(console.log))
reportWebVitals();

我得到以下错误:

未捕获的错误:[应用程序]不是<Route>组件.所有组件 <Routes>岁的子元素必须是<Route>分或<React.Fragment>分

我用的是最新版本的react-router.