title: Why the SKStoreReviewController does not let me submit a review?
body: <p>I succeeded implementing the <code>SKStoreReviewController</code>. But when the prompt comes up, the "Submit" button is grey &amp; disabled. </p>
  
  <p><a href="https://i.stack.imgur.com/AOYhr.png" rel="noreferrer"><img src="https://i.stack.imgur.com/AOYhr.png" alt="SKStoreReviewController"></a></p>
  
  <p>I thought it was because I was in debug mode, but when I ship the app with Ad-Hoc PP the result is the same.</p>
  
  <p>Why?</p>