title: Issue in promoting app from beta to production
body: <p>I had uploaded an app to Beta and had a few users test it, it was fine and later I moved it to production and it got published as well. After it got published, it isn't working. This is the error it shows:</p>
  
  <p><img src="https://i.stack.imgur.com/JU7FF.jpg" alt="This is the error that it shows"></p>
  
  <blockquote>
    <p>Cannot open the html file '<a href="http://localhost:0/" rel="nofollow noreferrer">http://localhost:0/</a>':<br>
    uriPort &lt;= 0: 0 (<a href="http://localhost:0/" rel="nofollow noreferrer">http://localhost:0/</a>)</p>
  </blockquote>
  
  <p>What do I do?</p>