问TypeError:对象NoneType不能在“await”expression discord.py中使用

EN

import discord
from discord.ext import commands



class Profile(commands.Cog):

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

    @commands.Cog.listener()
    async def on_ready(self):
        print("Profile Cog has been loaded\n-----")

    # @commands.command(aliases=['pm'])
    # async def dm(self, ctx, user: discord.User, *, message=None):
    #   message = message or "This message is sent via dm"
    #   await user.send(message)
    #   await ctx.message.delete()

    @commands.command()
    async def createprofile(self, ctx, member: discord.Member = None):
        userName = ""
        userAge = ""
        questions = [
            "Please input your name/nickname:",
            "Please input your age:"
        ]
        dmChannel = await ctx.author.send(
            "Yo will be receiving two questions. One involving your name and the other your age.")

        def check(message):
            return message.author == ctx.author and message.channel == dmChannel.channel

        async def askquestion(question):
            await ctx.author.send(question)
            print("Waiting for reply...")
            userReply = await commands.wait_for('message', check=check)
            print("User replied")
            return userReply.content

        userName = await askquestion(questions[0])
        userAge = await askquestion(questions[1])
        e = discord.Embed(title=str(userName) + "'s Profile", description=f"""
        Age: `{str(userAge)}`
        """)
        await ctx.send(embed=e)


def setup(bot):
    bot.add_cog(Profile(bot))

Traceback (most recent call last):
  File "C:\Users\dargo\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\core.py", line 85, in wrapped
    ret = await coro(*args, **kwargs)
  File "C:\Users\dargo\Desktop\In-Depth\cogs\profile.py", line 42, in createprofile
    userName = await askquestion(questions[0])
  File "C:\Users\dargo\Desktop\In-Depth\cogs\profile.py", line 38, in askquestion
    userReply = await commands.wait_for('message', check=check)
TypeError: object NoneType can't be used in 'await' expression
``