This is most likely due to missing SA-VMWNetappUtils and SA-Hydra on the Search Head. There is a deployment matrix for the app here:
http://docs.splunk.com/Documentation/VMW/3.4.1/Installation/DownloadandinstalltheSplunkAppforVMware
If you only installing the VMWare Add-on and not the app you can use this deployment guide:
https://docs.splunk.com/Documentation/AddOns/released/VMW/Install
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