title: File Not Loaded with gulp-concat
body: <p>After <code>gulp-concat</code>, new concatenated <code>js</code> file is added in my project folder and then I start server but file is not loaded in the browser . 
  Server responded with 404 .</p>
  
  <p><strong>Browser Console:</strong></p>
  
  <p><a href="https://i.stack.imgur.com/KDrUt.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/KDrUt.png" alt="enter image description here"></a></p>
  
  <p><strong>Browser Developer Tool's Application Tab</strong></p>
  
  <p><a href="https://i.stack.imgur.com/LWBDl.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/LWBDl.png" alt="enter image description here"></a></p>
  
  <p><strong>Gulp File</strong></p>
  
  <p><a href="https://i.stack.imgur.com/B7PeY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/B7PeY.png" alt="enter image description here"></a></p>