The Verge reported that users were having trouble playing video through the app on a jailbroken iPad. Amazon didn’t not have a definitive explanation for the issue, but upon playback users receive the error in the screenshot above.
The Verge reports:
It’s not immediately clear what in the jailbreaking process interferes with the Instant Video app or vice versa, although the presence of either the APT encryption key manager or the Cydia app store appears to be a factor.
To fix this problem, open Cydia and install the xCon tweak. This tweak will bypass any jailbreak restrictions for most apps. This method definitely works and will get you up and running on Amazon Instant Video. The xCon tweak is free of charge in the Cydia Store.
Let me know if this fix works for you!