Thanks for reaching out here in the Community!
We'd like to gather more information about the issue you're running into. A few questions here to better understand what you're experiencing:
1. Does the issue only occur on a PLEX channel or all channels on your Roku device?
2. Are you receiving error messages or codes when accessing the channel?
3. What troubleshooting steps have you taken so far to try to resolve the issue? Have you removed the channel, restart the device then add the channel back? Note: Please make sure to restart your Roku device after removing the channel and before adding the channel back to ensure the process is successful.
4. What are you seeing on screen? Can you provide a screenshot of the issue you are experiencing?
We recommend starting here to troubleshoot any channel playback issues: How to resolve a channel playback issue
Please keep us posted and we'll continue assisting you from there.