title: Can't publish facebook instant article in development mode
body: <p>For some reason, I can't publish articles using custom CMS solution we have made in Laravel. The developer which made this does not work with us anymore, and client requested to change the facebook page. He used this SDK: <a href="https://github.com/facebook/facebook-instant-articles-sdk-php" rel="nofollow noreferrer">https://github.com/facebook/facebook-instant-articles-sdk-php</a></p>
  
  <p>New Facebook page needs to go through verification for instant article. </p>
  
  <p>So, when I set development_mode=false, I get the error "This page has not been accepted in the review process for publishing Instant Articles yet", which is fine, that error is expected.</p>
  
  <p>But, when I change to development_mode=true, nothing happens, no errors. The request went without errors, but article was not published in the Development Articles.</p>
  
  <p>Any idea what might be the problem here?</p>