Thanks for letting us know about the issue you're experiencing.
We'd like to gather more information about the issue you're running into. Does the issue only occur on a specific channel or all channels on your Roku device? What was the error message when attempted to stream the channel?
In some cases, removing then re-installing the channel may help. To ensure the process is successful, follow the steps below making sure you restart your Roku device before adding the channel again.
Remove the channel: Highlight the channel tile on your home screen and press the Star button to open the options menu. Select Remove channel and confirm.
Restart your Roku device: If it is inconvenient to reach the power cord to unplug your Roku device, you can restart the device from the settings menu. Go to Settings > System > System restart > Restart.
Re-install the channel: After your Roku device restarts, visit the Roku Channel Store and add the channel again.