我有这个齿轮，但它不发送嵌入，我甚至尝试与嵌入，但它只发送第一个文本，我不知道为什么。

from discord.ext import commands 

class HelpCommand(commands.Cog):
def __init__(self, client):
    self.client = client

@commands.Cog.listener()
async def on_ready(self):
    print("Test Ready")

@commands.command(aliases=["h"])
async def command(self, ctx):
    await ctx.send(f'Please wait')
    embed = discord.Embed(title="Help for the bot",
                          description="", color=discord.Colour.purple())
    embed.set_footer(icon_url=ctx.author.avatar_url,
                     text=f"Requested by {ctx.author.name}")
    await ctx.send(embed=embed)
async def setup(client):
    await client.add_cog(HelpCommand(client))