I'd be happy to take a closer look to see how we can help. A few questions here to better understand what you're experiencing:
Are you using a Roku TV or a Roku device?
Does the issue only occur on a specific channel or all channels on your Roku device?
Are you receiving error messages or codes when accessing the channel
What troubleshooting steps have you taken so far to try to resolve the issue
What are you seeing on screen? Can you provide a screenshot of the issue you are experiencing?
Have you tried removing the channel, restarting your device from Settings>System>Power>System restart (If you do not see a Power submenu, skip to the next step), then once it loads up again, adding the channel back once more to see if that clears things up?