# Buggy code
async def _perms_blacklist_list(self, ctx: commands.Context):
    """List all keywords added to the blacklist."""
    blacklist = await self.config.guild(ctx.guild).url_keyword_blacklist()
    if not blacklist:
        return await self._embed_msg(ctx, _("Nothing in the blacklist."))
    blacklist.sort()
    text = ""
    total = len(blacklist)
    pages = []
    for i, entry in enumerate(blacklist, 1):
        text += f"{i}. [{entry}]"
        if i != total:
            text += "\n"
            if i % 10 == 0:
                pages.append(box(text, lang="ini"))
                text = ""
        else:
            pages.append(box(text, lang="ini"))
    embed_colour = await ctx.embed_colour()
    pages = list(
        discord.Embed(title="Whitelist", description=page, colour=embed_colour)
        for page in pages
    )
    await menu(ctx, pages, DEFAULT_CONTROLS)


# 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 _perms_blacklist_list(self, ctx: commands.Context):
    """List all keywords added to the blacklist."""
    blacklist = await self.config.guild(ctx.guild).url_keyword_blacklist()
    if not blacklist:
        return await self._embed_msg(ctx, title=_("Nothing in the blacklist."))
    blacklist.sort()
    text = ""
    total = len(blacklist)
    pages = []
    for i, entry in enumerate(blacklist, 1):
        text += f"{i}. [{entry}]"
        if i != total:
            text += "\n"
            if i % 10 == 0:
                pages.append(box(text, lang="ini"))
                text = ""
        else:
            pages.append(box(text, lang="ini"))
    embed_colour = await ctx.embed_colour()
    pages = list(
        discord.Embed(title="Blacklist", description=page, colour=embed_colour)
        for page in pages
    )
    await menu(ctx, pages, DEFAULT_CONTROLS)