Facebook Login - Valid OAuth Redirect URIs

For Facebook login, what should I put in the “Valid OAuth Redirect URIs” settings?

I’ve tried https://www.example.com/auth?authclient=facebook but I still get the following error:
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.