在公共组Java脚本quickblox中发送消息

Question

我可以在组中发送消息，但不能在公共组中发送消息 这是我的代码，请检查

 msg = {
        type: 'groupchat',
        body: document.forms.send_message.message_feald.value.trim(),
        extension: {
            save_to_history: 1,
            messageType: MsgType,
            userId: app.userBasicDetails.UserId,
            profile: app.userBasicDetails.UserPhoto,
            userName: app.userBasicDetails.Name

        },
        markable: 1,
        senderId: app.userBasicDetails.QuickBloxId
    };

    // Don't send empty message
    if (!msg.body) return false;

    var dialogJid = QB.chat.helpers.getRoomJidFromDialogId(dialogId);
    QB.chat.send(dialogJid, msg);
    self.sendMessage(dialogId, msg);