Vkonakte 的机器人不回复消息

Question

没有显示任何错误，尽管机器人不回复消息。令牌和组 ID 正确。

import vk_api
from vk_api.bot_longpoll import VkBotLongPoll, VkBotEventType
from data import token, group_id
from random import random

vk_session = vk_api.VkApi(token=token)
vk = vk_session.get_api()
longpoll = VkBotLongPoll(vk_session, group_id)


def sender(id, text):
    vk_session.method('messages.send', {'user_id': id, 'message': text, 'random_id': 0})


while True:
    longpoll = VkBotLongPoll(vk_session, group_id)
    for event in longpoll.listen():
        if event.type == VkBotEventType.MESSAGE_NEW:
            msg = event.object.message['text'].lower()
            if event.to_me:
                id = event.user_id

                if msg == 'hi':
                    sender(id, 'hello')