AttributeError:"NoneType"对象没有属性"channels"

我的Discord机器人模块出现问题.我收到 AttributeError:'NoneType'对象没有属性'channels'我不确定它抛出此错误的方式:

Hi I'm having an issue with a module for my Discord bot. I'm getting AttributeError: 'NoneType' object has no attribute 'channels' I'm not sure way it's throwing out this error:

这就是我正在使用的东西:

Here is what I'm working with:

from discord.ext import commands
from discord.utils import get
import logging as log
from datetime import datetime,timedelta
import discord
import os
from .utils import checks
from run import UKGBot


import asyncio


class Pinner():
    """Pins messages to a specific channel."""

    def __init__(self, bot: UKGBot):
        self.bot = bot



    async def on_message(self, message):
        """Listen for message then pin it"""
        try:
            guild = message.guild
            channel = get(message.guild.channels, name="gtky")
            pins = await message.channel.pins()
            if message.channel == channel and message.type != discord.MessageType.pins_add:
                if len(pins) == 20:
                    await message.unpin(pins[-1])
                await asyncio.sleep(3) 
                await message.pin()

        except discord.Forbidden:
            print("No permissions to do that!")


    def setup(bot):
        """Setup function"""
        to_add = Pinner(bot)
        bot.add_listener(to_add.on_message, 'on_message')
        bot.add_cog(to_add)