Facebook Unity SDK 11.0 AppRequest not doing anything on Iphone

Question

I am trying to get this working on Iphone and Ipad

public void FacebookInvite()
{
    FB.AppRequest( PlayerPrefs.GetString("Username") + " challenges you",
        null, new List<object> (){ "app_users" }
        , null, null, null, "Some Text",
        delegate (IAppRequestResult result)
        {
            
            Debug.Log(result.ErrorDictionary);
            Debug.Log(result.RawResult);
        });
        
}

The function sends me to a page where i can select the facebook users i want to invite to the game, it sends me back to the game. Returns me this data:

{"callback_id":"2","to":["5143145481245867"],"to[0]":"51431454890458127","request":"396643388961375","didComplete":true

I added all required values in the APP dashboard and the app is in Live mode.

But nobody seems to be getting a game invite on their Facebook app.

I also tried to use it on someone else his game and seems to be not working either. Is it just broken ?

Thanks in advance