Remove the ‘Modern apps’ (anything from the ‘Store’) from the profile you are using to create your Windows 10 image.

clean.ps1

# Remove some Windows Store pakacges which are blocking Sysprep
# Execution of scripts has to be neabled: Set-ExecutionPolicy RemoteSigned
# https://forums.fogproject.org/topic/5873/windows-10-unattend-xml-sysprep-answer-file-challenge/16

$AppsList = "Microsoft.Bing" , "Microsoft.BingFinance" , "Microsoft.BingMaps" , "Microsoft.BingNews"`
            , "Microsoft.BingSports" , "Microsoft.BingTravel" , "Microsoft.BingWeather" , "Microsoft.Camera"`
            , "microsoft.microsoftskydrive" , "Microsoft.Reader" , "microsoft.windowscommunicationsapps"`
            , "microsoft.windowsphotos" , "Microsoft.XboxLIVEGames" , "Microsoft.ZuneMusic"`
            , "Microsoft.ZuneVideo" , "Microsoft.Media.PlayReadyClient"
            , "9E2F88E3.Twitter", "king.com.CandyCrushSaga"

ForEach ($App in $AppsList)
{
    $PackageFullName = (Get-AppxPackage $App).PackageFullName
    if ((Get-AppxPackage $App).PackageFullName)
    {
        Write-Host "Removing Package: $App"
        remove-AppxProvisionedPackage -online -packagename $PackageFullName
        remove-AppxPackage -package $PackageFullName
    }
    else
    {
        Write-Host "Unable to find package: $App"
    }
}