Installation of CUBASE AI failure

Getting this when I try to Install through Steinberg Installation Assistant:

Cannot run program “cmd” (in directory “notAvailable\Steinberg\Install Assistant”): CreateProcess error=267, The directory name is invalid
at java.security.AccessController.doPrivileged(Native Method)

What version of Cubase AI is it? Is it the latest one? Are you use using Windows or Mac and what versions of those are you trying to install on?