CimException with Network Controller

I am trying to install Network controller on a 2016tp5 VM following this procedure: https://technet.microsoft.com/en-us/library/mt282165.aspx

I get an error while running the command  

Install-NetworkController –Node $node –ClientAuthentication Kerberos -ClientSecurityGroup Contoso\NCRESTClients -ServerCertificate $cer

I get the following output:

Install-NetworkController : One or more errors occurred.
At line:1 char:1
+ Install-NetworkController -ClientAuthentication Kerberos -Node $node  ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Install-NetworkController], CimException
    + FullyQualifiedErrorId : HRESULT 80131500,Microsoft.Windows.Networking.NetworkController.PowerShell.InstallNetworkContr
   ollerCommand

Any ideas? I've tried to search the exception elsewhere but I can't seem to find what it means. What is that CimException?

Thanks!

**EDIT**

by running $error[5]|Format-List -force I get

Exception             : Microsoft.Management.Infrastructure.CimException: One or more errors occurred.
                           at Microsoft.Windows.Networking.NetworkController.PowerShell.ServerProviderWrapper.GetClusterConfi
                        guration(NetworkControllerCluster& clusterConfiguration)
TargetObject          :
CategoryInfo          : NotSpecified: (:) [Install-NetworkController], CimException
FullyQualifiedErrorId : HRESULT
                        80131500,Microsoft.Windows.Networking.NetworkController.PowerShell.InstallNetworkControllerCommand
ErrorDetails          : One or more errors occurred.
InvocationInfo        : System.Management.Automation.InvocationInfo
ScriptStackTrace      : at <ScriptBlock>, <No file>: line 1
PipelineIterationInfo : {}
PSMessageDetails      :