Opus not loaded, only occurs on VPS

Whenever I try to make my music bot join a voice channel with this code:

    elif message.content.startswith(";music join") or message.content.startswith(";music j") or message.content.startswith(";m j"):
        try:
            await create_voice_client(message.author.voice_channel)
            await bot.send_message(message.channel, "I joined your voice chat!")
        except discord.errors.InvalidArgument:
            await bot.send_message(message.channel, "You don't seen to be in a voice channel :/")
        except Exception as error:
            await bot.send_message(message.channel, "Error: **{}**".format(error))

It works while running on my PC, but the same code gives me this error on my VPS:

Ignoring exception in on_message
Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/discord/client.py", line 307, in _run_event
    yield from getattr(self, event)(*args, **kwargs)
  File "Musicbot.py", line 697, in on_message
    await create_voice_client(message.author.voice_channel)
  File "Musicbot.py", line 38, in create_voice_client
    voice = await bot.join_voice_channel(channel)
  File "/usr/local/lib/python3.5/dist-packages/discord/client.py", line 3209, in join_voice_channel
    voice = VoiceClient(**kwargs)
  File "/usr/local/lib/python3.5/dist-packages/discord/voice_client.py", line 230, in __init__
    self.encoder = opus.Encoder(48000, 2)
  File "/usr/local/lib/python3.5/dist-packages/discord/opus.py", line 197, in __init__
    raise OpusNotLoaded()
discord.opus.OpusNotLoaded

And I can’t figure out what’s wrong

When I put

if not discord.opus.is_loaded():
    # the 'opus' library here is opus.dll on windows
    # or libopus.so on linux in the current directory
    # you should replace this with the location the
    # opus library is located in and with the proper filename.
    # note that on windows this DLL is automatically provided for you
    discord.opus.load_opus('opus')

at the start of my file, the bot does not start and tells me it didn’t find the specified directory. Any idea?

[gerdmuehlberger]

@Emad-Fussi

Thanks, I tried deploying my bot on heroku and in my case your solution fixed the issue.

[Omd-5]

this Buildpack: https://github.com/xrisk/heroku-opus.git will fix it 100%.