Hello! Such error happens on Mac OS 10.13 High Sierra, Cinema 4D R23.
The plugin was written in C++. It happens in a funtion that calls python to get the machine ID. Something like this:
value = os.popen("ioreg -rd1 -c IOPlatformExpertDevice | grep -E '(UUID)'").read().split()[-1][1:-1]
Any ideas what might be the solution?
Cinema 4D R23 require at least mac os 10.14 and the most optimal is 10.15.
In your case you need to update to 10.15.
See Cinema 4D R23 Requierements.