The error message "the following required properties are missing: fb app_id" typically arises when the F a c e b ook SDK integration in an application lacks the required app_id. To resolve this:
Check Application Setup: Ensure that your Fa ce b ook App is properly configured with an app_id. Go to the F a c e book Developer Dashboard, select your app, and locate the app_id.
Integrate app_id: Inside your codebase (e.g., HTML), verify that the F a c e b ook SDK initialization code includes the correct app_id. For instance, in JavaScript, it might look like: FB.init({ appId: 'YOUR_APP_ID' }).
Update Permissions: If needed, review and update the permissions required by your app in the Fa c e book Developer Dashboard.
Test & Debug: After making changes, test the integration to ensure the error no longer occurs.