Facebook App Not Setup Errors
Problem
You see the following error while attempting to authenticate with WHMCS using Facebook® Sign-In Integrations:
App Note Setup: This app is still in development mode, and you don't have access to it. Switch to a registered test user or ask an app admin for permissions.
For more information, see Sign In Using Facebook.
Cause
Your Facebook app is currently in Development Mode.
Solution
Update your Facebook app settings to use Public Mode.
Last modified: 2025 March 25