Hi @Joanne2013,
Thank you for contacting us in the Roku Community. We extend a warm welcome to you!
We'd like to assist you with the channel playback issue you are encountering while accessing your Prime Video channel.
We recommend removing the channel initially, performing a simple restart, and then adding it back to see if it resolves the issue.
For a more detailed explanation, please refer to the guided steps provided in the following document: How to Resolve a Channel Playback Issue.
Sincerely,
Rey
ERey.
Roku Community Moderator