Hi @valenana,
Welcome to the Roku Community!
We understand that you're having a problem with the streaming channels. Help is here. Please try restarting your router. Once the router has completed its restart, you must restart the Roku TV by pressing the Home button on the remote control and selecting Settings, System, Power, and System Restart.
If the issue persists, you can also refer to this support article on how to resolve a channel playback issue.
Please keep us posted on what you find out.
All the best,
John
John
Roku Community Moderator