DiscordBotが起動できない


私は[このコード](https://qiita.com/koucha0124/items/3aeb075a83823eaa48d6)を参照に修正しながらDiscordBOTを作りました。しかし、これを実行してもコードが最後のbot.runまでたどり着かずに、またprint文も「4」までしか出力されずにプログラムが終了してしまいます。エラーは何も出ません。いろいろ調べたのですがよくわかりません。

[code]

    import asyncio
    
    import discord
    import youtube_dl
    
    from discord.ext import commands
    
    # Suppress noise about console usage from errors
    youtube_dl.utils.bug_reports_message = lambda: ''
    
    
    ytdl_format_options = {
        'format': 'bestaudio/best',
        'outtmpl': '%(extractor)s-%(id)s-%(title)s.%(ext)s',
        'restrictfilenames': True,
        'noplaylist': True,
        'nocheckcertificate': True,
        'ignoreerrors': False,
        'logtostderr': False,
        'quiet': True,
        'no_warnings': True,
        'default_search': 'auto',
        'source_address': '0.0.0.0' # bind to ipv4 since ipv6 addresses cause issues sometimes
    }
    
    ffmpeg_options = {
        'options': '-vn'
    }
    
    ytdl = youtube_dl.YoutubeDL(ytdl_format_options)
    print(1)
    
    class YTDLSource(discord.PCMVolumeTransformer):
        print(2)
        def __init__(self, source, *, data, volume=0.5):
            super().__init__(source, volume)
    
            self.data = data
    
            self.title = data.get('title')
            self.url = data.get('url')
    
        @classmethod
        async def from_url(cls, url, *, loop=None, stream=False):
            loop = loop or asyncio.get_event_loop()
            data = await loop.run_in_executor(None, lambda: ytdl.extract_info(url, download=not stream))
    
            if 'entries' in data:
                # take first item from a playlist
                data = data['entries'][0]
    
            filename = data['url'] if stream else ytdl.prepare_filename(data)
            return cls(discord.FFmpegPCMAudio(filename, **ffmpeg_options), data=data)
    
    
    class Music(commands.Cog):
        print(3)
        def __init__(self, bot):
            self.bot = bot
    
        @commands.command()
        async def join(self, ctx, *, channel: discord.VoiceChannel):
            """Joins a voice channel"""
    
            if ctx.voice_client is not None:
                return await ctx.voice_client.move_to(channel)
    
            await channel.connect()
    
        @commands.command()
        async def play(self, ctx, *, query):
            """Plays a file from the local filesystem"""
    
            source = discord.PCMVolumeTransformer(discord.FFmpegPCMAudio(query))
            ctx.voice_client.play(source, after=lambda e: print('Player error: %s' % e) if e else None)
    
            await ctx.send('Now playing: {}'.format(query))
    
        @commands.command()
        async def yt(self, ctx, *, url):
            """Plays from a url (almost anything youtube_dl supports)"""
    
            async with ctx.typing():
                player = await YTDLSource.from_url(url, loop=self.bot.loop)
                ctx.voice_client.play(player, after=lambda e: print('Player error: %s' % e) if e else None)
    
            await ctx.send('Now playing: {}'.format(player.title))
    
        @commands.command()
        async def stream(self, ctx, *, url):
            """Streams from a url (same as yt, but doesn't predownload)"""
    
            async with ctx.typing():
                player = await YTDLSource.from_url(url, loop=self.bot.loop, stream=True)
                ctx.voice_client.play(player, after=lambda e: print('Player error: %s' % e) if e else None)
    
            await ctx.send('Now playing: {}'.format(player.title))
    
        @commands.command()
        async def volume(self, ctx, volume: int):
            """Changes the player's volume"""
    
            if ctx.voice_client is None:
                return await ctx.send("Not connected to a voice channel.")
    
            ctx.voice_client.source.volume = volume / 100
            await ctx.send("Changed volume to {}%".format(volume))
    
        @commands.command()
        async def stop(self, ctx):
            """Stops and disconnects the bot from voice"""
    
            await ctx.voice_client.disconnect()
    
        @play.before_invoke
        @yt.before_invoke
        @stream.before_invoke
        async def ensure_voice(self, ctx):
            if ctx.voice_client is None:
                if ctx.author.voice:
                    await ctx.author.voice.channel.connect()
                else:
                    await ctx.send("You are not connected to a voice channel.")
                    raise commands.CommandError("Author not connected to a voice channel.")
            elif ctx.voice_client.is_playing():
                ctx.voice_client.stop()
    
    print(4)
    intents = discord.Intents().all()
    bot = commands.Bot(command_prefix=commands.when_mentioned_or("!"),description='Relatively simple music bot example',intents=intents)
    
    @bot.event
    async def on_ready():
        print(5)
        print('Logged in as {0} ({0.id})'.format(bot.user))
        print('------')
        bot.add_cog(Music(bot))
        bot.run('token')
    
[/code]

