Slash commands doesn't work?

[Ioplock]

Uncommon error after recent discord update

When I'm trying to start a bot which has any slash commands, it gives me this error:

Traceback (most recent call last):
  File "C:\Users\ioplock\AppData\Local\Programs\Python\Python310\lib\site-packages\discord\client.py", line 382, in _run_event
    await coro(*args, **kwargs)
  File "C:\Users\ioplock\AppData\Local\Programs\Python\Python310\lib\site-packages\discord\bot.py", line 1147, in on_connect
    await self.sync_commands()
  File "C:\Users\ioplock\AppData\Local\Programs\Python\Python310\lib\site-packages\discord\bot.py", line 770, in sync_commands
    await self._bot.http.bulk_upsert_command_permissions(self._bot.user.id, guild_id, guild_cmd_perms)
  File "C:\Users\ioplock\AppData\Local\Programs\Python\Python310\lib\site-packages\discord\http.py", line 359, in request
    raise HTTPException(response, data)
discord.errors.HTTPException: 405 Method Not Allowed (error code: 0): 405: Method Not Allowed```

[Lulalaby]

Duplicate, already in issues and has existing pr