1. 确认Bot token是否正确，正确方式是：bot = Bot(token=BOT_TOKEN)
2. 确认Chat ID是否正确，正确方式是：chat_id = update.message.chat.id
3. 确认消息发送方式是否正确，正确方式是：await bot.send_message(chat_id=chat_id, text='Hello, World!')

例子：

from aiogram import Bot, types
from aiogram.dispatcher import Dispatcher
from aiogram.utils import executor

BOT_TOKEN = 'Your bot token here'

bot = Bot(token=BOT_TOKEN)
dp = Dispatcher(bot)


@dp.message_handler(commands=['start'])
async def send_welcome(message: types.Message):
    chat_id = message.chat.id
    await bot.send_message(chat_id=chat_id, text='Hello, World!')


if __name__ == '__main__':
    executor.start_polling(dp, skip_updates=True)