Iohub eyetracking demo fails


I fail to run the eyetracking demo in PsychoPy v2022.1.2, using python 3, windows 11.

I get following error message:

## Running: C:\Program Files\PsychoPy\lib\site-packages\psychopy\demos\coder\iohub\eyetracking\ ##
Traceback (most recent call last):
  File "C:\Program Files\PsychoPy\lib\site-packages\psychopy\demos\coder\iohub\eyetracking\", line 58, in <module>
    io = launchHubServer(window=win, **devices_config)
  File "C:\Program Files\PsychoPy\lib\site-packages\psychopy\contrib\", line 118, in __call__
    return obj(*args, **kwargs)
  File "C:\Program Files\PsychoPy\lib\site-packages\psychopy\iohub\client\", line 256, in launchHubServer
    return ioHubConnection(iohub_config)
  File "C:\Program Files\PsychoPy\lib\site-packages\psychopy\iohub\client\", line 296, in __init__
    raise RuntimeError('Error starting ioHub server: {}'.format(self.iohub_status))
RuntimeError: Error starting ioHub server: ioHub startup failed.

I have seen similar topics on this forum, but none of them seems to provide an answer.

Does somebody have an idea on how to fix this?

Best regards and thank you,