title: Lumen not working out of the box
body: <p>Just installed Lumen framework.
  hit the link <a href="http://localhost/lumen/public/" rel="noreferrer">http://localhost/lumen/public/</a> in my browser and got this following error, anyone got any idea about it?
  Traced it back to the app.php file in bootstrap folder.</p>
  
  <p><img src="https://i.stack.imgur.com/AfyLm.png" alt="lumen application.php error"></p>