I bought this addon so i could use the facebook invite feature, however that's the only feature that doesn't work. The developers have no idea what the issue is, and the error logs do not appear to be logging anything. I have uninstalled the addon as it is pretty much useless to me now.
There were no cases when our customers had issues with invitation not working and we couldn't find the reason. Please contract us and provide your Ticket ID and we will review it again. The invitations definitely work as they are advertised if you have everything properly configured. The only known issue is Facebook invites not being sent on some servers which block XMPP requests, and one can do nothing with it but to configure server firewall to allow XMPP protocol usage.
Thank you!