I had the same problem and got responses in the facebook developers community. It seems like it is confirmed bug: https://developers.facebook.com/bugs/230322797329131/?hc_location=ufi Update: It seems to work now. Since Tuesday this week I can see reviewers sending messages to the bot and get responses in the messages of the page.
Sending private message through api is now possible. Fire this event for sending message(initialization of facebook object should be done before). to:user id of facebook function facebook_send_message(to) { FB.ui({ app_id:’xxxxxxxx’, method: ‘send’, name: “sdfds jj jjjsdj j j “, link: ‘https://apps.facebook.com/xxxxxxxaxsa’, to:to, description:’sdf sdf sfddsfdd s d fsf s ‘ }); } Properties app_id Your … Read more