As suggested, I am posting a new post regarding this issue as the issue still persists on my Firestick after attempting to reset it (and resetting the modem as well).
When speaking with Amazon, they claim that the Roku Channel cannot play on a Firestick (even though it is in the available applications and downloadable.)
Thank you,
-jenB
Hello! @jen-B,
We appreciate your post here in the Roku Community!
Thank you for sharing the troubleshooting steps you've taken so far with your Amazon Firestick. We appreciate your efforts and will pass them along to the appropriate Roku team.
Please let us know if there's anything else we can help you with.
Regards,
Arjiemar