I cannot find related native functions Get-WUInstall and Get-WURebootStatus that calls in UpdateAndSysprep.ps1. Did you declared in other script?

$Host.UI.RawUI.WindowTitle = "Installing updates..."
Get-WUInstall -AcceptAll -IgnoreReboot
if (Get-WURebootStatus -Silent)
{
$Host.UI.RawUI.WindowTitle = "Updates installation finished. Rebooting."
shutdown /r /t 0
}

PS C:\Users\Administrator> Import-Module .\Desktop\VMSwitchPortMonitorMode.psm1
PS C:\Users\Administrator> get-VMSwitchPortMonitorMode -SwitchName VLAN10-Management-External
gwmi : Invalid object path
At C:\Users\Administrator\Desktop\VMSwitchPortMonitorMode.psm1:49 char:21

•         $eswp = gwmi -Namespace $ns -Query "ASSOCIATORS OF {$lep2} WHERE Res ...
  

• - CategoryInfo          : InvalidOperation: (:) [Get-WmiObject], ManagementException
  - FullyQualifiedErrorId : GetWMIManagementException,Microsoft.PowerShell.Commands.GetWmiObjectCommand
  
  

gwmi : Invalid object path
At C:\Users\Administrator\Desktop\VMSwitchPortMonitorMode.psm1:50 char:19

•         $sw = gwmi -Namespace $ns -Query "ASSOCIATORS OF {$eswp} WHERE Resul ...
  

• - CategoryInfo          : InvalidOperation: (:) [Get-WmiObject], ManagementException
  - FullyQualifiedErrorId : GetWMIManagementException,Microsoft.PowerShell.Commands.GetWmiObjectCommand
  
  

gwmi : Invalid object path
At C:\Users\Administrator\Desktop\VMSwitchPortMonitorMode.psm1:49 char:21

•         $eswp = gwmi -Namespace $ns -Query "ASSOCIATORS OF {$lep2} WHERE Res ...
  

• - CategoryInfo          : InvalidOperation: (:) [Get-WmiObject], ManagementException
  - FullyQualifiedErrorId : GetWMIManagementException,Microsoft.PowerShell.Commands.GetWmiObjectCommand
  
  

gwmi : Invalid object path
At C:\Users\Administrator\Desktop\VMSwitchPortMonitorMode.psm1:50 char:19

•         $sw = gwmi -Namespace $ns -Query "ASSOCIATORS OF {$eswp} WHERE Resul ...
  

• • CategoryInfo : InvalidOperation: (:) [Get-WmiObject], ManagementException

  • FullyQualifiedErrorId : GetWMIManagementException,Microsoft.PowerShell.Commands.GetWmiObjectCommand

                                           PortType                                                 MonitorMode
                                           --------                                                 -----------
                                           External                                                        None
                                               Host                                                        None
    

PS C:\Users\Administrator> get-VMSwitchPortMonitorMode VLAN10-Management-External
gwmi : Invalid object path
At C:\Users\Administrator\Desktop\VMSwitchPortMonitorMode.psm1:49 char:21

•         $eswp = gwmi -Namespace $ns -Query "ASSOCIATORS OF {$lep2} WHERE Res ...
  

• - CategoryInfo          : InvalidOperation: (:) [Get-WmiObject], ManagementException
  - FullyQualifiedErrorId : GetWMIManagementException,Microsoft.PowerShell.Commands.GetWmiObjectCommand
  
  

gwmi : Invalid object path
At C:\Users\Administrator\Desktop\VMSwitchPortMonitorMode.psm1:50 char:19

•         $sw = gwmi -Namespace $ns -Query "ASSOCIATORS OF {$eswp} WHERE Resul ...
  

• - CategoryInfo          : InvalidOperation: (:) [Get-WmiObject], ManagementException
  - FullyQualifiedErrorId : GetWMIManagementException,Microsoft.PowerShell.Commands.GetWmiObjectCommand
  
  

gwmi : Invalid object path
At C:\Users\Administrator\Desktop\VMSwitchPortMonitorMode.psm1:49 char:21

•         $eswp = gwmi -Namespace $ns -Query "ASSOCIATORS OF {$lep2} WHERE Res ...
  

• - CategoryInfo          : InvalidOperation: (:) [Get-WmiObject], ManagementException
  - FullyQualifiedErrorId : GetWMIManagementException,Microsoft.PowerShell.Commands.GetWmiObjectCommand
  
  

gwmi : Invalid object path
At C:\Users\Administrator\Desktop\VMSwitchPortMonitorMode.psm1:50 char:19

•         $sw = gwmi -Namespace $ns -Query "ASSOCIATORS OF {$eswp} WHERE Resul ...
  

• • CategoryInfo : InvalidOperation: (:) [Get-WmiObject], ManagementException

  • FullyQualifiedErrorId : GetWMIManagementException,Microsoft.PowerShell.Commands.GetWmiObjectCommand

                                           PortType                                                 MonitorMode
                                           --------                                                 -----------
                                           External                                                        None
                                               Host                                                        None
    

Scripts to install openssl on windows fail due to 404.

Need a new source , or perhaps host it somewhere more reliable.

Pull-requests and issues have not had any attention since at least September 2016. It seems this repostitory is no longer maintained.

@alexpilotti can you confirm or clarify this by any chance?