I am noob, and this is my firts post here.
I’m writing a program, which should recognize speech from audio file (and first transform file from .ogg to .wav).
Here is my code:

import speech_recognition
import pydub


def ogg2wav(filename):
    new_filename = filename.replace('.ogg', '.wav')
    audio = pydub.AudioSegment.from_file(filename)
    audio.export(new_filename, format='wav')
    return new_filename


ogg2wav("audio.ogg")

recognizer = speech_recognition.Recognizer()
with speech_recognition.WavFile('audio.wav') as source:
    wav_audio = recognizer.record(source)
print(recognizer.recognize_whisper(wav_audio, language='ru'))

when I run a program I get an error:

Traceback (most recent call last):
  File "C:/Users/Алексей/PycharmProjects/pythonProject1/skillbox_voice_transform.py", line 17, in <module>
    print(recognizer.recognize_whisper(wav_audio, language='ru'))
  File "C:UsersАлексейAppDataRoamingPythonPython38site-packagesspeech_recognition__init__.py", line 1408, in recognize_whisper
    import whisper
  File "C:UsersАлексейAppDataRoamingPythonPython38site-packageswhisper.py", line 69, in <module>
    libc = ctypes.CDLL(libc_name)
  File "C:Program FilesPython38libctypes__init__.py", line 363, in __init__
    if '/' in name or '\' in name:
TypeError: argument of type 'NoneType' is not iterable

How to fix it?
Thanks

I searched this error in google, but found only general information.