This issue is resolved in vCenter Server 6.5.x, available at
VMware Downloads.
To work around this issue in previous version, update the PATH variable to include vSphere CLI for vSphere 6.0.
The default path is:
PATH="C:\Program Files (x86)\VMware\VMware vSphere CLI\bin";"C:\Program Files (x86)\VMware\VMware vSphere CLI\Perl\bin";%PATH%