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im using react router v6 and i every time i use initializing for authentication in my main file it shows this error. i cant find a solution in the internet for it. i want to render some routes only when there is a user but now it doesnt render anything.

AuthNavigator

import React, { useState, useEffect } from 'react';
import app from './firebase';
import { Router, Routes, Route } from 'react-router-dom';

import AuthStack from './stacks/AuthStack';
import AppStack from './stacks/AppStack';
import StaticStack from './stacks/StaticStack';

function AuthNavigator() {
  const [initializing, setInitializing] = useState(true);
  const [user, setUser] = useState(() => app.auth().currentUser);

  useEffect(() => {
    const unsubscribe = app.auth().onAuthStateChanged((user) => {
      if (user) {
        setUser(user);
      } else {
        setUser(null);
      }
      if (initializing) {
        setInitializing(false);
      }
    });

    // cleanup subscription
    return unsubscribe;
  }, []);

  if (initializing) return 'Loading....';

  return (
    <Router>
      <Routes>
        <Route path="*" element={<StaticStack />} />
        <Route path="auth/*" element={<AuthStack user={user} />} />
        <Route path="app/*" element={<AppStack user={user} />} />
      </Routes>
    </Router>
  );
}
export default AuthNavigator;

App.js

import React from 'react';
import './App.css';
import AuthNavigator from './AuthNavigator';
import { Router } from 'react-router-dom';

function App() {
  return (
    <Router>
      <AuthNavigator />
    </Router>
  );
}

export default App;

Answers

I had the same issue. My issue is because of the following reason. I had a Header component which consists of NavLink which is a router component. I placed this Header component inside the App component. My App component was like this:

function App() {
  return(
      <Header/>
      <Router>
        <Routes>
          <Route path="/" element={<Homepage/>}/>
          <Route path="/shop" element={<Shop/>}/>
          <Route path="/signin" element={<Signin/>}/>
        </Routes>
      </Router>
  )
}

In the above App component, I have placed Header component outside of Router. Since in the Header component I have used NavLink which is a Router component caused this error. Then I moved Header component into the Router component then it worked fine. Finally my code looked like this:

function App() {
  return(
      <Router>
        <Header/>
        <Routes>
          <Route path="/" element={<Homepage/>}/>
          <Route path="/shop" element={<Shop/>}/>
          <Route path="/signin" element={<Signin/>}/>
        </Routes>
      </Router>
  )
}