Anki startup problem

Error during startup:
Traceback (most recent call last):
  File "/usr/lib64/python3.6/site-packages/anki/mpv.py", line 330, in _get_response
    message = self._response_queues[self._thread_id()].get(block=True, timeout=timeout)
  File "/usr/lib64/python3.6/queue.py", line 172, in get
    raise Empty
queue.Empty

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib64/python3.6/site-packages/anki/mpv.py", line 355, in _send_request
    return self._get_response(timeout)
  File "/usr/lib64/python3.6/site-packages/anki/mpv.py", line 332, in _get_response
    raise MPVTimeoutError("unable to get response")
anki.mpv.MPVTimeoutError: unable to get response

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib64/python3.6/site-packages/anki/mpv.py", line 330, in _get_response
    message = self._response_queues[self._thread_id()].get(block=True, timeout=timeout)
  File "/usr/lib64/python3.6/queue.py", line 172, in get
    raise Empty
queue.Empty

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib64/python3.6/site-packages/aqt/main.py", line 45, in __init__
    self.setupUI()
  File "/usr/lib64/python3.6/site-packages/aqt/main.py", line 73, in setupUI
    self.setupSound()
  File "/usr/lib64/python3.6/site-packages/aqt/main.py", line 329, in setupSound
    anki.sound.setupMPV()
  File "/usr/lib64/python3.6/site-packages/anki/sound.py", line 135, in setupMPV
    mpvManager = MpvManager()
  File "/usr/lib64/python3.6/site-packages/anki/sound.py", line 104, in __init__
    super().__init__(window_id=None, debug=False)
  File "/usr/lib64/python3.6/site-packages/anki/mpv.py", line 438, in __init__
    self.register_callback(name, method)
  File "/usr/lib64/python3.6/site-packages/anki/mpv.py", line 495, in register_callback
    self.command("enable_event", name)
  File "/usr/lib64/python3.6/site-packages/anki/mpv.py", line 560, in command
    return self._send_request({"command": list(args)}, timeout=timeout)
  File "/usr/lib64/python3.6/site-packages/anki/mpv.py", line 362, in _send_request
    return self._send_request(message, timeout, _retry-1)
  File "/usr/lib64/python3.6/site-packages/anki/mpv.py", line 355, in _send_request
    return self._get_response(timeout)
  File "/usr/lib64/python3.6/site-packages/anki/mpv.py", line 332, in _get_response
    raise MPVTimeoutError("unable to get response")
anki.mpv.MPVTimeoutError: unable to get response