Why is it only showing a white screen when i try to add a new page on both pages

import './App.css';
import Header from './Header';
import Home from './Home';
import { BrowserRouter as Router, Routes, Route } from "react-router-dom";


function App() {
  return (

    // BEM
    <Router>
      <div className="App">


        <Routes>
          <Route path="/check">
            <Header />
            
          </Route>


          
          <Route path="/">
            <Header />
            <Home />
          </Route>
        </Routes>

      </div>
    </Router>

  );
}

export default App;

Why is it only showing a white screen when i try to add a new page on both pages