Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
My mother's Roku Express device was giving the message that it did not have enough space and to delete some channels, which she tried. To no avail. This happened whether she was trying to load YouTube or some other channel.
I did a System Restart (essentially turning the Roku off then on again) and it cleared the problem. She was running the latest software Build 4200.