I'd be happy to take a closer look to see how we can help get you up and running.
A few questions here to better understand what you're experiencing:
1. Are you using a Roku TV or a Roku device?
2. What channel are you trying to add to your Roku device?
3. Are you receiving error messages or codes when adding the channel?
4. What troubleshooting steps have you taken so far to try to resolve the issue?
Have you tried performing a factory reset on your Roku device to see if that resolves the issue you are experiencing that was previously posted by @RokuDanny-R?
For more information about how to perform a factory reset, visit our Support page here: How do I factory reset my Roku® streaming device? | Official Roku Support
Follow the steps below from your Roku device to perform a factory reset.
Press the Home button home on your Roku remote.
Scroll up or down and select Settings.
Select Advanced system settings.
Select Factory reset.
Select Factory reset everything and follow the on-screen instructions.
Factory reset/ Language
Let us know if there's any difference after.