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.
Unfortunately, it looks like the January 13th 2021 YouTube update has damaged the app on ROKU. I have tried removing and re-installing but the same problem occurs. When you click on the app a small YouTube box appears in the middle of the screen, the screen goes black and then you are back to the ROKU Home screen again, it refuses to load. Two of our ROKU's so far have the same issue.
Re: YouTube January 2021 Update has killed the App
I got mine to work, I went to Settings on the main page, then to System and then to System Restart, and restarted the system, after that You Tube came back on and is working fine, you might try that, hope it works for you.