title: Android IAB Error RPC:S-7 AEC-0
body: <p>I made an app with In-app billing, tested it and published it without any problem at all. The in-app purchase worked.
  Now i'm doing an update with a new in-app purchase and can't buy anything with my new update, Play Store purchase fragment always give me this message:</p>
  
  <pre><code>Error while retrieving informations from server [RPC:S-7:AEC-0]
  </code></pre>
  
  <p>Logcat gives me this error:</p>
  
  <pre><code>02-12 12:15:27.524: E/Volley(5650): [629] BasicNetwork.performRequest: Unexpected response code 500 for https://android.clients.google.com/fdfe/commitPurchase
  02-12 12:15:27.539: D/Finsky(5650): [1] PurchaseFragment.handleError: Error: PurchaseError{type=2 subtype=0}
  </code></pre>
  
  <p>The Play Store app has the same versionCode as the one i'm developping, and my test account is the first account on the phone. THe in-app item is already been published and active.
  I tried deleting my test account and readding it, cleasing data and cache from Google Play Services and Play Store, even with other users it gives the same error.
  Please help me, i really don't know what to do.</p>