Facebook app can be really troublemaker sometimes when Facebook doesn't respond, yes this happens most of the time and I have found some ways to get this issue fixed which you can find below:- - If you dont have storage left on your device then Free some storage. - Check updates for your Facebook app - Fix your Internet connection speed - Delete all the Facebook app cache - Update your mobile phone

Also read: https://sites.google.com/view/getassistnet/social-media/facebook/Fix-Facebook-not-responding?authuser=2