Peacock app no opening up to sign in

Hi, Tokipepe 

Greetings, and welcome to the Roku Community.

Thanks for letting us know about the problem you have faced with the Peacock app not opening upon sign-in on your three Roku devices, and we'd be happy to assist. Please refer to the troubleshooting step below to resolve the issue.

1. Navigate to the channel tile on the Roku home screen, press the star (*) key on your remote, and choose "Remove channel".
2. Next, restart your device from Settings > System > Power > System Restart (If you do not see a Power submenu, skip to the next step).
3. Once your player/TV starts up again, go to "Streaming Store" on the Home screen, and add the channel back once more.
4. You may also refer to this link: How to resolve a channel playback issue | Official Roku Support

Once this troubleshooting step has been performed, kindly access the app once more to see any improvements.

We hope this works, and keep us posted on what you find out.

Best wishes,
Kash