If you try to expand the Hyper V plugin it shows the following error:
The term 'Get-Cluster' is not recognized as the name of a cmdlet, function, script file, or operable program…
The Cluster nodes do not have the Failover Cluster Module for Windows PowerShell.
Netvault uses cmdlets that comes along with Failover Cluster Module for Windows PowerShell to send commands to the cluster. This needs to be installed.
You need to install the Failover Cluster Module for Windows PowerShell
From powershell run:
install-windowsfeature RSAT-Clustering-PowerShell