Dynamics NAV 2017 on Azure

Hi,

We had installed Dynamics NAV 2017 in Azure from the App found in Marketplace. I am trying to prepare Clickonce install link for installing Windows clients. when I run in Power shell I am getting below error:-


You cannot call a method on a null-valued expression.

At C:\DEMO\Clickonce\install.ps1:36 char:1

+ $PublicMachineName = $config.SelectSingleNode("//appSettings/add[@key ...


The line 36 as shown below:-


$PublicMachineName = $config.SelectSingleNode("//appSettings/add[@key='PublicWebBaseUrl']").value.Split('/')[2].ToLower()


I need to specify any parameters in config file?