I've created an app in FB for your module, but I cannot get it to work.
When I push "Login with Facebook" I get the following error message:
Warning
Invalid Scopes: user_managed_groups. This message is only shown to developers. Users of your app will ignore these permissions if present. Please read the documentation for valid permissions at: developers.facebook.com/docs/facebook-login/permissions
In FB dev - App review I have created: Page Public Content Access.
Dont know which one needs to be created to get it work. Your manual for this module is very outdated.