Hi,
I've tested it with everything I could find here. USB-Sticks, Keyboards, Mice and my Android-Smartphone. Of course I used the example Sketches related to my device (Mass Storage, HID, ADK). But the error code appears always. Even if there is no device connected. As long as the shield is connected and powered up I get this error code.
Btw. Thanks for trying to help. You're the first one that does 
TheJokerzz