import asyncio
from aiogram import Bot, Dispatcher
from aiogram.types import Message
from aiogram.dispatcher import filters
bot = Bot(token="")
dp = Dispatcher(bot)
@dp.message_handler(commands=['start'])
async def cmd_start(message: Message):
await message.answer("Доброго времени суток!")
await message.reply("Как дела?")
async def main():
await dp.start_polling()
if __name__ == "__main__":
asyncio.run(main())
@dp.message() - нету такого декоратора.