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.
This is due to the AWS (Amazon Web Services) being down. Until they are up again, nothing will download. Good news is, if the channel is already downloaded, it will still work. Unfortunately, for people like me who just bought a new device, cannot download the channels until this is resolved.
Roku says some services are working, but I have not found any yet.