import {
  BrowserRouter,
  Routes,
  Route
} from "react-router-dom";



function App() {
  return (


  <BrowserRouter>
    <Routes>
      <Route path="/" element={<Home />} />
      <Route path="/profile/:username" element={<Profile />} />
      <Route path="/login" element={<Login />} />
      <Route path="/resister" element={<Resister />} />
     


     
    </Routes>
  </BrowserRouter>

Please make sure that you are using the latest version of React. And if you are using another code for adding routes then you have to use this code instead of yours.