Why does the bot not enter the voice channel (discord.py)?

Question

Python

Here is a piece of code:

@Client.command(pass_context=True)
async def join(ctx):
  await ctx.author.voice.channel.connect()

Here is the error:

discord.ext.commands.errors.CommandInvokeError: Command raised an exception: RuntimeError: PyNaCl library needed in order to use voice

Why this library, if the bot just needs to go to the voice channel?

Answer 1

the error says that to use the voice functions, the bot needs the PyNaCl library.
To install it, run in a terminal:
pip install pynacl