I have an issue with SolidCP 1.4.2 with HyperV service provider configured. I am getting this error when I try to create a new VM: 

OS Template: Windows 2012 R2 DC

00:00:00 Setup external network
00:00:00 Assigning external IP addresses
00:00:00 Setting external primary IP address
00:00:00 Setup management network
00:00:00 Management network setup - Skipped
00:00:00 Setup private network
00:00:00 Private network setup - Skipped
00:00:00 OS Template Generation: 2
00:00:00 SecureBoot: Enabled
00:00:00 OS Template: Win2012R2DC
00:00:00 Start Converting template VHD
00:00:00 Template VHD path: C:Hyper-VSCPTemplatesWin2012R2DC.vhdx
00:00:00 Converting to 'C:Hyper-VSCPCustomerscust4cust4-6Virtual Hard Diskscust4-6.vhdx'
00:03:16 Template VHD size: 80 GB
00:03:16 Expanding to 60 GB
00:03:16 Expand VHD - Skipped
00:03:23 Skip expanding VHD - no volumes found
00:03:23 Sysprep file: WindowsSystem32sysprepunattend.xml
00:03:23 Error processing sysprep file: Index was outside the bounds of the array.
00:03:24 CPU cores: 1
00:03:24 RAM: 1048 MB
00:03:24 Creating Virtual Machine object
00:03:30 Error creating Virtual Machine object: System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.Management.Automation.ParameterBindingValidationException: Cannot validate argument on parameter 'SwitchName'. The argument is null or empty. Provide an argument that is not null or empty, and then try the command again. ---> System.Management.Automation.ValidationMetadataException: The argument is null or empty. Provide an argument that is not null or empty, and then try the command again. at System.Management.Automation.ValidateNotNullOrEmptyAttribute.Validate(Object arguments, EngineIntrinsics engineIntrinsics) at System.Management.Automation.ParameterBinderBase.BindParameter(CommandParameterInternal parameter, CompiledCommandParameter parameterMetadata, ParameterBindingFlags flags) --- End of inner exception stack trace --- at System.Management.Automation.Runspaces.PipelineBase.Invoke(IEnumerable input) at SolidCP.Providers.Virtualization.PowerShellManager.ExecuteInternal(Command cmd, Boolean addComputerNameParameter, Boolean withExceptions) at SolidCP.Providers.Virtualization.NetworkAdapterHelper.Update(PowerShellManager powerShell, VirtualMachine vm) at SolidCP.Providers.Virtualization.HyperV2012R2.UpdateVirtualMachine(VirtualMachine vm) at SolidCP.Providers.Virtualization.HyperV2012R2.CreateVirtualMachine(VirtualMachine vm) at SolidCP.Server.VirtualizationServer2012.CreateVirtualMachine(VirtualMachine vm) --- End of inner exception stack trace ---
System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.Management.Automation.ParameterBindingValidationException: Cannot validate argument on parameter 'SwitchName'. The argument is null or empty. Provide an argument that is not null or empty, and then try the command again. ---> System.Management.Automation.ValidationMetadataException: The argument is null or empty. Provide an argument that is not null or empty, and then try the command again.
at System.Management.Automation.ValidateNotNullOrEmptyAttribute.Validate(Object arguments, EngineIntrinsics engineIntrinsics)
at System.Management.Automation.ParameterBinderBase.BindParameter(CommandParameterInternal parameter, CompiledCommandParameter parameterMetadata, ParameterBindingFlags flags)
--- End of inner exception stack trace ---
at System.Management.Automation.Runspaces.PipelineBase.Invoke(IEnumerable input)
at SolidCP.Providers.Virtualization.PowerShellManager.ExecuteInternal(Command cmd, Boolean addComputerNameParameter, Boolean withExceptions)
at SolidCP.Providers.Virtualization.NetworkAdapterHelper.Update(PowerShellManager powerShell, VirtualMachine vm)
at SolidCP.Providers.Virtualization.HyperV2012R2.UpdateVirtualMachine(VirtualMachine vm)
at SolidCP.Providers.Virtualization.HyperV2012R2.CreateVirtualMachine(VirtualMachine vm)
at SolidCP.Server.VirtualizationServer2012.CreateVirtualMachine(VirtualMachine vm)
--- End of inner exception stack trace ---
at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at SolidCP.Providers.Virtualization2012.VirtualizationServer2012.CreateVirtualMachine(VirtualMachine vm)
at SolidCP.EnterpriseServer.VirtualizationServerController2012.CreateVirtualMachineInternal(String taskId, VirtualMachine vm, LibraryItem osTemplate, Int32 externalAddressesNumber, Boolean randomExternalAddresses, Int32[] externalAddresses, Int32 privateAddressesNumber, Boolean randomPrivateAddresses, String[] privateAddresses, String summaryLetterEmail)
00:03:31 VPS was not created

Please advise, what could be the issue here?