title: Can't deploy app on GitHub using gh-pages
body: <p>I have deployed a few days ago React app on GitHub. Yesterday I made changes and something went wrong - I deleted gh-pages after pushing changes on master branch and when I type in terminal</p>
  
  <pre><code>npm run deploy
  </code></pre>
  
  <p>I have error like this
  <a href="https://i.stack.imgur.com/fR1BR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/fR1BR.png" alt="enter image description here"></a></p>
  
  <p>I have 2 questions:</p>
  
  <ol>
  <li>How to update website in github.io when I made changes?</li>
  <li>How can I deploy app again on GitHub pages?</li>
  </ol>
  
  <p>Edit:
  Here's solution:
  <a href="https://github.com/facebook/create-react-app/issues/4854" rel="nofollow noreferrer">https://github.com/facebook/create-react-app/issues/4854</a></p>