Windows installer version of DisplayCAL seems lacking pyglet

[Headcrabed]

When exiting installer version of DisplayCAL 3.9.14, an error window popped:

log here:

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Exception ignored in atexit callback: <function _delete_audio_driver at 0x0000019C120153A0>
Traceback (most recent call last):
  File "pyglet\media\drivers\__init__.pyc", line 79, in _delete_audio_driver
  File "pyglet\media\__init__.pyc", line 48, in <module>
  File "pyglet\media\player.pyc", line 11, in <module>
ModuleNotFoundError: No module named 'pyglet.gl'
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Exception ignored in atexit callback: <function _delete_audio_driver at 0x00000270FEA4D300>
Traceback (most recent call last):
  File "pyglet\media\drivers\__init__.pyc", line 79, in _delete_audio_driver
  File "pyglet\media\__init__.pyc", line 48, in <module>
  File "pyglet\media\player.pyc", line 11, in <module>
ModuleNotFoundError: No module named 'pyglet.gl'
Exception ignored in atexit callback: <function _delete_audio_driver at 0x00000278F9985300>
Traceback (most recent call last):
  File "pyglet\media\drivers\__init__.pyc", line 79, in _delete_audio_driver
  File "pyglet\media\__init__.pyc", line 48, in <module>
  File "pyglet\media\player.pyc", line 11, in <module>
ModuleNotFoundError: No module named 'pyglet.gl'
Exception ignored in atexit callback: <function _delete_audio_driver at 0x0000019D7E545300>
Traceback (most recent call last):
  File "pyglet\media\drivers\__init__.pyc", line 79, in _delete_audio_driver
  File "pyglet\media\__init__.pyc", line 48, in <module>
  File "pyglet\media\player.pyc", line 11, in <module>
ModuleNotFoundError: No module named 'pyglet.gl'
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