`Get-WinGetConfiguration` can't open a valid WinGet config file

Brief description of your issue

• Microsoft.WinGet.Configuration v1.8.1911-alpha: https://www.powershellgallery.com/packages/Microsoft.WinGet.Configuration/1.8.1911-alpha
• Used winget config to find path to the config file.
• Get-WinGetConfiguration -File 'C:\Users\olavb\AppData\Local\Packages\Microsoft.DesktopAppInstaller_8wekyb3d8bbwe\LocalState\settings.json' fails with:
  • Get-WinGetConfiguration: Failed to open configuration set at C:\Users\olavb\AppData\Local\Packages\Microsoft.DesktopAppInstaller_8wekyb3d8bbwe\LocalState\settings.json with error 0x8A15C002 The configuration file is invalid. See line 5, column 16 in the file.
  • 

Steps to reproduce

See description

Expected behavior

Should be able to read a default WinGet config file. Could it be due to JSON with comments?

Actual behavior

Fails.

Environment

Windows Package Manager v1.8.1911
Copyright (c) Microsoft Corporation. All rights reserved.

Windows: Windows.Desktop v10.0.22631.3880
System Architecture: X64
Package: Microsoft.DesktopAppInstaller v1.23.1911.0

Winget Directories                 
-----------------------------------------------------------------------------------------------------------------------
Logs                               %LOCALAPPDATA%\Packages\Microsoft.DesktopAppInstaller_8wekyb3d8bbwe\LocalState\Diag
User Settings                      %LOCALAPPDATA%\Packages\Microsoft.DesktopAppInstaller_8wekyb3d8bbwe\LocalState\sett
Portable Links Directory (User)    %LOCALAPPDATA%\Microsoft\WinGet\Links
Portable Links Directory (Machine) C:\Program Files\WinGet\Links
Portable Package Root (User)       %LOCALAPPDATA%\Microsoft\WinGet\Packages
Portable Package Root              C:\Program Files\WinGet\Packages
Portable Package Root (x86)        C:\Program Files (x86)\WinGet\Packages
Installer Downloads                %USERPROFILE%\Downloads

Links               
---------------------------------------------------------------------------
Privacy Statement   https://aka.ms/winget-privacy
License Agreement   https://aka.ms/winget-license
Third Party Notices https://aka.ms/winget-3rdPartyNotice
Homepage            https://aka.ms/winget
Windows Store Terms https://www.microsoft.com/en-us/storedocs/terms-of-sale

Admin Setting                             State
--------------------------------------------------
LocalManifestFiles                        Disabled
BypassCertificatePinningForMicrosoftStore Disabled
InstallerHashOverride                     Disabled
LocalArchiveMalwareScanOverride           Disabled
ProxyCommandLineOptions                   Disabled
DefaultProxy                              Disabled

Start with the Get-WinGetConfiguration entry point and the settings.json file path shown in the report, then reproduce the failure with the supplied command and WinGet version details. Determine why this valid default configuration is rejected, including whether its JSON comments are relevant; done means the command can open the default WinGet configuration file.