Welcome and thank you for posting here in the Roku Community, @Sjb1031!
We'd be happy to be of assistance here and help you find the best resolution for this.
Since you've mentioned about removing and reinstalling the app, have you performed a system reboot in between? We need to make sure that the troubleshooting steps of removing the app, performing a system reboot, and then reinstalling it have been followed precisely to work.
You may refer to this support article for more thorough details: How to resolve a channel playback issue
If the issue persists after doing so, we highly recommend coordinating this with the channel provider as they manage and maintain their app on the Roku streaming platform independently.
You may reach them here: Prime Video Support
We hope this will be sorted out soon so you can continue streaming.
Regards,
Carly
Carly Y.
Roku Community Moderator