Messenger Bot does not reply to random user?

Question

I will do my best to explain the problem I am having. When I am using the bot from my own FB account, everything works fine.

But when I ask others to use it, the bot does not respond to them, although I have got green tick on pages_messaging in dev.FB.

Basic sendText function which makes the bot write a reply:

function sendText(sender, text){
    let messageData = {text : text}
    console.log("comes here too" + " message data: " +messageData);
    request({
        url: "https://graph.facebook.com/v2.6/me/messages",
        qs : {access_token : token},
        method: "POST",
        json: {
            recipient : {id: sender},
            message : messageData
        }
    }, function(error, response, body){
        if ( error){
            console.log("sending error")
        } else if(response.body.error){
            console.log("messageData: " + messageData + "recipient " + sender)
            console.log("response body error" + response + " body "+body)
        }
    })
}

The errors I am getting then some-one else is trying to connect to bot: I am getting the following with my 3 console.logs that go through:

comes here too message data: [object Object]

messageData: [object Object]recipient (MyOtherAccountIDIsHere)

response body error[object Object] body [object Object]

My Initial thought is that bot-review did not work properly and the page actually is not approved. Since on my developer FB account, I get to chat to the bot normally w/o any problems (last else if with 2 console.logs does not appear)

Please, let me know what do you think, willing to provide any additional information if needed.

Answer 1

SO SILLY mistake from me. Thank you @CBroe for your help.

The answer: I had to go to App Review Tab and click the Make appID public? YES!