Hello @Nataly0422
Thanks for posting in the Roku Community!
In some cases, removing the affected channel and then re-installing it may help. To ensure the process is successful, make sure to restart your device before adding the channel back in. We would recommend doing this from the Settings menu by navigating to Settings > System > System restart > Restart.
For detailed instructions, refer to this Support link: How to resolve a channel playback issue
Let us know if this works for you!
Regards,
Karla