我正在用Discord.py做一个机器人，我对如何使用该函数有些疑问，create_custom_emojis()因为无论做什么，我都会收到HTTP错误400。
这是我创建表情符号的代码：
with open("data/emojis/image.png", "rb") as image:
image_byte = image.read()
emoji = await self.bot.create_custom_emoji(server, name="emo", image=image_byte)
我得到的错误是：
Traceback (most recent call last):
File "C:\Program Files (x86)\Python35\lib\asyncio\tasks.py", line 239, in _step
result = coro.send(None)
File "C:\Users\armel\Downloads\Discord bot\Red-DiscordBot\cogs\moga.py", line 385, in read_feeds
message = await self._feed_check(server, chan_id, name, infos)
File "C:\Users\armel\Downloads\Discord bot\Red-DiscordBot\cogs\moga.py", line 198, in _feed_check
await self.create_custom_emojis(server)
File "C:\Users\armel\Downloads\Discord bot\Red-DiscordBot\cogs\moga.py", line 189, in create_custom_emojis
emoji = await self.bot.create_custom_emoji(server, name=name, image=image_byte)
File "lib\discord\client.py", line 2519, in create_custom_emoji
data = yield …