Arm template issue while creating AD with json and PS-DSC

I am just trying to configure an Active Directory machine via ARM and PS-DSC entn. The VM provisioning works while the DSC extn fails with the following errors. Attached is the json and DSC script.
Please help.

_"message": "VM has reported a failure when processing extension
'Microsoft.Powershell.DSC'. Error message: \"The DSC Extension received an incorrect input:
Compilation errors occurred while processing configuration 'Main'. Please review the errors
reported in error stream and modify your configuration code appropriately.
System.InvalidOperationException error processing property 'DomainAdministratorCredential' OF
TYPE 'xADDomain': Converting and storing encrypted passwords as plain text is not recommended.
For more information on securing credentials in MOF file_

Calling Script used with parameters:
##Define Variables
{
$location='Southeast Asia'
$resourceGroupName='learn-iaas'
$resourceDeploymentName='learn-iaas-deployment'
$templatePath='E:'+'\Arm Temple'+'\AD'
$templateFile='AD-VM.json'
#$templateFile='Armtemplate-Iaas.json'
$template=$templatepath + '\'+$templatefile
$password='India@123'
$securePassword=$password|ConvertTo-SecureString -AsPlainText -Force
}
##Create ResourceGroup
{
New-AzureRmResourceGroup `
-Name $resourceGroupName `
-Location $location `
-Verbose -Force
}

##Deploy Resources
{
$additionalParameters=New-Object -TypeName Hashtable
$additionalParameters['advmAdminPassword']=$securePassword
#$additionalParameters['vmprivateAdminPassword']=$securePassword

New-AzureRmResourceGroupDeployment `
-Name $resourceDeploymentName `
-ResourceGroupName $resourceGroupName `
-TemplateFile $template `
-mode incremental `
-verbose `
@additionalParameters


}

Start by reviewing AD-VM.json and the DSC configuration named Main, then compare the reported DomainAdministratorCredential error with the parameters passed by the shown PowerShell deployment script. Done means the DSC extension compiles the configuration successfully and the Active Directory VM deployment completes without the reported credential error.

Written by the indexing model from the issue text.