title: No error message is displayed, the server only returned a "500 Internal Server Error"
body: <p>I have set up a new Symfony3 project locally, but when I'm getting something wrong in my code the error is not displayed, only </p>
  
  <blockquote>
    <p>The server returned a "500 Internal Server Error"</p>
  </blockquote>
  
  <p>Is any other setting is required to display the exact error message on page?</p>