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?