After upgrading my Nexus 7 to Android 4.3, I noticed that some Google Play apps refused to update.
Also when I was testing In-App-Purchasing I always got the error “Error retrieving information from server. [RPC:S-7:AEC-0]” when trying to make a test-purchase.
After a lot of investigating it turns out that you’ll need to clear your system cache *and* also remove/re-activate your Google account on the device.
-
To clear your system cache start the Settings app. In the “Device” section go to Storage->Cached data. Choose OK from the dialog.
-
To remove/re-activeate your Google account start the Settings app. In the “Accounts” section choose Google. Tap on your account name. Then tap on the icon in the upper-right of the screen and choose “Remove account” from the drop-down. Later choose “Add account” from the “Accounts” section to register your account again.
-
Reboot your device.
After I did the above I was able to upgrade the apps that were failing, and my IAP testing started to work as expected.