Hello Problem_with_FacebookLive,
Thanks for reaching out to us. We're happy to help with this trouble you're having with your FaceBook app. First, let's make sure the app is up-to-date. Follow the steps here to check and update if needed:
Update apps or use automatic downloads
If the app is already updated, then try deleting it and reinstalling from the App Store. Get the steps here to delete the app if needed:
How to delete apps on your iPhone, iPad, and iPod touch
If this issue persists after reinstalling the app, we suggest getting in touch with the app developer for further assistance. You can find the guidance to reach them here:
How to contact an app developer
We hope this helps you.
Have a great day!