# Buggy code
async def play(self, ctx: commands.Context, *, query: str):
    """Play a URL or search for a track."""
    guild_data = await self.config.guild(ctx.guild).all()
    restrict = await self.config.restrict()
    if restrict and match_url(query):
        valid_url = url_check(query)
        if not valid_url:
            return await self._embed_msg(ctx, _("That URL is not allowed."))
    if not self._player_check(ctx):
        if self._connection_aborted:
            msg = _("Connection to Lavalink has failed.")
            if await ctx.bot.is_owner(ctx.author):
                msg += " " + _("Please check your console or logs for details.")
            return await self._embed_msg(ctx, msg)
        try:
            if (
                not ctx.author.voice.channel.permissions_for(ctx.me).connect
                or not ctx.author.voice.channel.permissions_for(ctx.me).move_members
                and userlimit(ctx.author.voice.channel)
            ):
                return await self._embed_msg(
                    ctx, _("I don't have permission to connect to your channel.")
                )
            await lavalink.connect(ctx.author.voice.channel)
            player = lavalink.get_player(ctx.guild.id)
            player.store("connect", datetime.datetime.utcnow())
        except AttributeError:
            return await self._embed_msg(ctx, _("Connect to a voice channel first."))
        except IndexError:
            return await self._embed_msg(
                ctx, _("Connection to Lavalink has not yet been established.")
            )
    if guild_data["dj_enabled"]:
        if not await self._can_instaskip(ctx, ctx.author):
            return await self._embed_msg(
                ctx, _("You need the DJ role to queue tracks.")
            )
    player = lavalink.get_player(ctx.guild.id)

    player.store("channel", ctx.channel.id)
    player.store("guild", ctx.guild.id)
    await self._eq_check(ctx, player)
    await self._data_check(ctx)
    if (
        not ctx.author.voice or ctx.author.voice.channel != player.channel
    ) and not await self._can_instaskip(ctx, ctx.author):
        return await self._embed_msg(
            ctx, _("You must be in the voice channel to use the play command.")
        )
    if not await self._currency_check(ctx, guild_data["jukebox_price"]):
        return
    query = audio_dataclasses.Query.process_input(query)
    if not query.valid:
        return await self._embed_msg(ctx, _("No tracks to play."))
    if query.is_spotify:
        return await self._get_spotify_tracks(ctx, query)
    await self._enqueue_tracks(ctx, query)


# Traceback (RuntimeError)
Traceback (most recent call last):
File "/home/martinebots/martinebotsvenv/lib/python3.7/site-packages/discord/ext/commands/core.py", line 79, in wrapped
ret = await coro(*args, **kwargs)
File "/home/martinebots/martinebotscogs/cogs_modified/audio/audio.py", line 3183, in play
await self._enqueue_tracks(ctx, query)
File "/home/martinebots/martinebotscogs/cogs_modified/audio/audio.py", line 3885, in _enqueue_tracks
result, called_api = await self.music_cache.lavalink_query(ctx, player, query)
File "/home/martinebots/martinebotscogs/cogs_modified/audio/apis.py", line 911, in lavalink_query
results = await player.load_tracks(query)
File "/home/martinebots/martinebotsvenv/lib/python3.7/site-packages/lavalink/rest_api.py", line 300, in load_tracks
self.__check_node_ready()
File "/home/martinebots/martinebotsvenv/lib/python3.7/site-packages/lavalink/rest_api.py", line 268, in __check_node_ready
raise RuntimeError("Cannot execute REST request when node not ready.")
RuntimeError: Cannot execute REST request when node not ready.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/home/martinebots/martinebotsvenv/lib/python3.7/site-packages/discord/ext/commands/bot.py", line 863, in invoke
await ctx.command.invoke(ctx)
File "/home/martinebots/martinebotsvenv/lib/python3.7/site-packages/discord/ext/commands/core.py", line 728, in invoke
await injected(*ctx.args, **ctx.kwargs)
File "/home/martinebots/martinebotsvenv/lib/python3.7/site-packages/discord/ext/commands/core.py", line 88, in wrapped
raise CommandInvokeError(exc) from exc
discord.ext.commands.errors.CommandInvokeError: Command raised an exception: RuntimeError: Cannot execute REST request when node not ready.```

# Fixed code
async def play(self, ctx: commands.Context, *, query: str):
    """Play a URL or search for a track."""
    query = audio_dataclasses.Query.process_input(query)
    guild_data = await self.config.guild(ctx.guild).all()
    restrict = await self.config.restrict()
    if restrict and match_url(query):
        valid_url = url_check(query)
        if not valid_url:
            return await self._embed_msg(
                ctx,
                title=_("Unable To Play Tracks"),
                description=_("That URL is not allowed."),
            )
    elif not await is_allowed(ctx.guild, f"{query}", query_obj=query):
        return await self._embed_msg(
            ctx,
            title=_("Unable To Play Tracks"),
            description=_("That track is not allowed."),
        )
    if not self._player_check(ctx):
        if self._connection_aborted:
            msg = _("Connection to Lavalink has failed")
            desc = EmptyEmbed
            if await ctx.bot.is_owner(ctx.author):
                desc = _("Please check your console or logs for details.")
            return await self._embed_msg(ctx, title=msg, description=desc)
        try:
            if (
                not ctx.author.voice.channel.permissions_for(ctx.me).connect
                or not ctx.author.voice.channel.permissions_for(ctx.me).move_members
                and userlimit(ctx.author.voice.channel)
            ):
                return await self._embed_msg(
                    ctx,
                    title=_("Unable To Play Tracks"),
                    description=_(
                        "I don't have permission to connect to your channel."
                    ),
                )
            await lavalink.connect(ctx.author.voice.channel)
            player = lavalink.get_player(ctx.guild.id)
            player.store("connect", datetime.datetime.utcnow())
        except AttributeError:
            return await self._embed_msg(
                ctx,
                title=_("Unable To Play Tracks"),
                description=_("Connect to a voice channel first."),
            )
        except IndexError:
            return await self._embed_msg(
                ctx,
                title=_("Unable To Play Tracks"),
                description=_("Connection to Lavalink has not yet been established."),
            )
    if guild_data["dj_enabled"]:
        if not await self._can_instaskip(ctx, ctx.author):
            return await self._embed_msg(
                ctx,
                title=_("Unable To Play Tracks"),
                description=_("You need the DJ role to queue tracks."),
            )
    player = lavalink.get_player(ctx.guild.id)

    player.store("channel", ctx.channel.id)
    player.store("guild", ctx.guild.id)
    await self._eq_check(ctx, player)
    await self._data_check(ctx)
    if (
        not ctx.author.voice or ctx.author.voice.channel != player.channel
    ) and not await self._can_instaskip(ctx, ctx.author):
        return await self._embed_msg(
            ctx,
            title=_("Unable To Play Tracks"),
            description=_("You must be in the voice channel to use the play command."),
        )
    if not query.valid:
        return await self._embed_msg(
            ctx,
            title=_("Unable To Play Tracks"),
            description=_("No tracks found for `{query}`.").format(
                query=query.to_string_user()
            ),
        )
    if not await self._currency_check(ctx, guild_data["jukebox_price"]):
        return
    if query.is_spotify:
        return await self._get_spotify_tracks(ctx, query)
    try:
        await self._enqueue_tracks(ctx, query)
    except QueryUnauthorized as err:
        return await self._embed_msg(
            ctx, title=_("Unable To Play Tracks"), description=err.message
        )