Whitelist of redirect URL

URL blocked: This redirect failed because the redirect URI is not white-listed in the app’s client OAuth settings. Make sure that the client and web OAuth logins are on and add all your app domains as valid OAuth redirect URIs.

Make sure you have saved exactly the following two domains in the App Domains option in Facebook app settings (step 9 https://support.heateor.com/how-to-get-facebook-app-id/):
www(dot)bounceonline.co.za
bounceonline(dot)co.za
(replace (dot) in above domains with actual dot)

..and exactly the following url in the Valid Oauth Redirect URIs option (step 14 https://support.heateor.com/how-to-get-facebook-app-id/):
https://www.bounceonline.co.za/?HeateorFblAuth=Facebook