title: How to fix "This item is no longer available." error while purchasing ANY in-app product using Play Billing library in android app?
body: <p><a href="https://i.stack.imgur.com/dwNBI.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dwNBI.jpg" alt="Play Billing In-App Purchase Error" /></a></p>
  <p>Hi,</p>
  <p>Users of my app are facing an error (shown above in the image) while trying to purchase ANY in-app product in my app. After a lot of googling and searching around, I could not find out the root cause of the problem.</p>
  <p>Things that I have already verified:</p>
  <ul>
  <li>In-App products ids are valid and in sync between app and developer
  console.</li>
  <li>All In-App products are active.</li>
  <li>Verified there is no error in Play Billing library integration. The error displayed in the image is shown by the Play Billing library UI and not by my app.</li>
  <li>Verified there are no issues reported for my developer console payments profile at payments.google.com.</li>
  </ul>
  <p>I use my own wrapper library over play billing library. <a href="https://github.com/ankitbatra11/billingr/tree/master/billingr/src/main/java/com/abatra/billingr" rel="nofollow noreferrer">The library</a> is open sourced at github. So, you can take a look at the entire source code <a href="https://github.com/ankitbatra11/billingr/tree/master/billingr/src/main/java/com/abatra/billingr" rel="nofollow noreferrer">there</a>.</p>
  <p>Kindly, do let me know if any more information is required. I have hit a wall in this one.</p>
  <p>Play Billing library version used: <code>3.0.2</code></p>