title: A Router may have only one child element
body: <p>Im try to learn react routing I created a project and in my index.js file i change my code as below</p>
  
  <pre><code>import React from 'react';
  import ReactDOM from 'react-dom';
  
  import { BrowserRouter as Router, Route, Link } from 'react-router-dom';
  
  import App from './components/App';
  import Signin from './components/Signin';
  import Signup from './components/Signup';
  
  ReactDOM.render(
      &lt;Router path="/"&gt;
          &lt;Route path="/app" component={App} /&gt;
          &lt;Route path="/signup" component={Signup} /&gt;                                                                    
          &lt;Route path="/signin" component={Signin} /&gt;
      &lt;/Router&gt;, document.getElementById('root')
  );
  </code></pre>
  
  <p>but it gives an error like below</p>
  
  <blockquote>
    <p>Module not found: Can't resolve 'react-router-dom' in
    'D:\REACT\react-crud\src'</p>
  </blockquote>