xRemoteFile fails to generate and execute with PowerShell 7

[i2bglobal]

Problem description

when running the example configuration to generate MOF

xRemoteFile_DownloadFile_Config -DestinationPath "$env:SystemDrive\fileName.jpg" -Uri 'http://www.contoso.com/image.jpg' -UserAgent [Microsoft.PowerShell.Commands.PSUserAgent]::InternetExplorer -Headers @{'Accept-Language' = 'en-US'}

I get this exception:

	 Invalid MOF definition for node 'localhost': Exception calling "ValidateInstanceText" with "1" argument(s): "Convert
		property 'Headers' value from type 'INSTANCE' to type 'INSTANCE[]' failed  At line:27, char:2  Buffer: wnloadFile_Config"; };^ insta "

Once the Headers is omitted then it works and generates the MOF file.
However when you run the push command 👍

Start-DscConfiguration –Path xRemoteFile_DownloadFile_Config –Wait -Force -Verbose

It errors out with this error:

	InvalidOperation: The PowerShell DSC resource DSC_xRemoteFile from module <xPSDesiredStateConfiguration,9.1.0> does not exist
	at the PowerShell module path nor is it registered as a WMI DSC resource.

Verbose logs

Invalid MOF definition for node 'localhost': Exception calling "ValidateInstanceText" with "1" argument(s): "Convert
			property 'Headers' value from type 'INSTANCE' to type 'INSTANCE[]' failed  At line:27, char:2  Buffer: wnloadFile_Config"; };^ insta "

		InvalidOperation: The PowerShell DSC resource DSC_xRemoteFile from module <xPSDesiredStateConfiguration,9.1.0> does not exist
		at the PowerShell module path nor is it registered as a WMI DSC resource.

DSC configuration

#Requires -Module xPSDesiredStateConfiguration
configuration xRemoteFile_DownloadFile_Config
{
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $DestinationPath,

        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [System.String]
        $Uri,

        [Parameter()]
        [System.String]
        $UserAgent,

        [Parameter()]
        [System.Collections.Hashtable]
        $Headers
    )

    Import-DscResource -ModuleName xPSDesiredStateConfiguration

    Node localhost
    {
        xRemoteFile DownloadFile
        {
            DestinationPath = $DestinationPath
            Uri             = $Uri
            UserAgent       = $UserAgent
            Headers         = $Headers
        }
    }
}

Suggested solution

Nope

Operating system the target node is running

OsName               : Microsoft Windows Server 2012 R2 Standard
OsOperatingSystemSKU : StandardServerEdition
OsArchitecture       : 64-bit
WindowsVersion       :
WindowsBuildLabEx    : 9600.20144.amd64fre.winblue_ltsb_escrow.211004-1908
OsLanguage           : en-US
OsMuiLanguages       : {en-US}

PowerShell version and build the target node is running

Name                           Value
----                           -----
PSVersion                      7.1.5
PSEdition                      Core
GitCommitId                    7.1.5
OS                             Microsoft Windows 6.3.9600
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0.}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

xPSDesiredStateConfiguration version

----                         ------- ----
xPSDesiredStateConfiguration 
9.1.0   C:\Users\SVC_RAView_Dev\Documents\PowerShell\Modules\xPSDesiredStateConfiguration\9.1.0\xPSDe.