We do apologize for the inconvenience this has caused you.
Just to confirm, did you restart your Roku device before re-installing the channel? That step is crucial when performing the troubleshooting. If you haven't tried the suggested order, we would recommend giving it a shot once again.
For detailed instructions, refer to this Support link: How do I resolve channel playback issues?
Moreover, if the issue persists, I'd recommend following @RokuMary-F's suggestion. The channel's customer support team is the best one to help you out with this matter,
All the best,
Roku Forum Moderator