spikeplus
Usually rebooting your Router and performing a System Restart (Settings/System/Power/System Restart) will resolve most Roku Channel and Roku related issues.
If an issue is confined to one channel/app, rather than the entire Roku platform (ie. no channels/apps will load), then usually the first troubleshooting step is to Remove, Restart, Reinstall (in that order).
1. Remove suspect channel/app (highlight channel, press * button on Roku remote, select Remove Channel.
2. Perform a System Restart in order to clear cache. (Settings/System/Power/System Restart or Settings/System/System Restart depending on device)
3. Reinstall the channel/app to the Roku device.