Thanks for asking the Apple Support Communities for help with the TV app on your iPhone. I will be happy to check this out with you.
I believe the best option for this is to try the troubleshooting steps provided in this help article: If an app you installed unexpectedly quits, stops responding, or won’t open .
If you get to the section titled "Delete and reinstall the app", you can do this using these steps:
1. Delete the TV app. You can use this help article: Remove built-in Apple apps from the Home screen on your iOS device with iOS 10 .
2. Restart your iPhone. If needed, use this help article: Restart your iPhone, iPad, or iPod touch .
3. Use the first article provided and reinstall the TV app.
Thanks again for visiting the Apple Support Communities. Have a great rest of your weekend.