google-apps-script - 谷歌聊天机器人不向聊天发送消息

Question

我设置了一个聊天机器人，它可以工作，有点。使用斜杠命令时会发送电子邮件，但除此之外，它不会将卡片发送到聊天室，说明我们收到了请求。我在这里想念什么？

function createMessage(voter, voteCount, shouldUpdate) {
  return {
    actionResponse: {
      type: shouldUpdate ? 'UPDATE_MESSAGE' : 'NEW_MESSAGE'
    },
    "cards": [{
      "header": {
        "title": "IM Support",
        "subtitle": "We have received your message",
        "imageUrl": "https://portal.oursite.net/assets/logoBlk.png",
        "imageStyle": "IMAGE"
      },
    }]
  };
}

function onMessage(e) {
  MailApp.sendEmail({
    to: "support@oursite.net",
    subject: "Subject",
    htmlBody: e.message.text,
  });
  if (e.message.slashCommand.commandId === '2') {
    return createMessage(e.user.displayName, 0);
  }
}

我参考了以下内容：

• https://developers.google.com/hangouts/chat/reference/message-formats/events
• https://github.com/googleworkspace/hangouts-chat-samples/blob/master/apps-script/vote-text-bot/vote-text-bot.js
• https://developers.google.com/hangouts/chat/samples

它显然正在获取信息：