Facebook log in

Facebook log in from iphone is not working. I’m not sure if I have to set up the ios application through facebook developers? If anyone knows that would be great to let me know.

Also when I attempt to log in through desktop I am given this
-URL Blocked: This redirect failed because the redirect URI is not whitelisted in the app’s Client OAuth Settings. Make sure Client and Web OAuth Login are on and add all your app domains as Valid OAuth Redirect URIs.

I did exactly what the screen shots on um shows and still didn’t work.

Do I need to create everything for the android and ios along with the desktop and what should I fix with this when logging in through desktop?