What's the problem?

Question

In contact with

Unhandled rejection (<{"statusCode":503,"body":"<!DOCTYPE ht...>, no stack trace)

Team:

cmd.hear(/(?:фан)/i, async (message) => { 
if(message.user.settings.adm < 888) return bot(`you dont have permission`); 
    request(`https://isinkin-bot-api.herokuapp.com/1/talk?q=${encodeURIComponent(message.text)}`).then(res => { 
      var bot = res.text;
      var msg = [`Бот говорит:`, `Бот записывает голосовое сообщение:`, `Бот хочет вам что-то сказать..`].random()
      googleTTS(bot, `ru`, 5).then(function (url) {
        vk.api.messages.setActivity({type: "audiomessage", chat_id: message.chatId})
        message.send(msg) 
        setTimeout(() => {message.sendAudioMessage(url)}).catch(function (err) {
          console.error(err.stack); }, 10000);
})
})
});

This is a command to talk to the bot, but it does not work, what's the problem?