title: WiX project 'incompatible' in VS2019
body: <p>worked-in: VS2017
  Microsoft Visual Studio Community 2019 Version 16.5.0
  WiX Toolset Visual Studio Extension version 1.0.0.4
  Microsoft Windows 10 Pro Version 10.0.17763 Build 17763</p>
  
  <p>Recently installed VS2019 community. wixprog opens with "incompatible’. I have Wix extension installed.</p>
  
  <p>I've contacted the VS2019 developers and they determined it's a WiX problem.</p>
  
  <p>Getting the following erros:</p>
  
  <blockquote>
    <p>An error occurred in '[Unknown]' while attempting to open 'eesPhotographyProperties.wxs'</p>
  </blockquote>
  
  <p>File Path: D:\Software\CSharp\SetupEesPhotography\SetupEesPhotography\eesPhotographyProperties.wxs</p>
  
  <p>Frame Model: VSFM_MdiChild</p>
  
  <p>Error Code: 0x80004005</p>
  
  <blockquote>
    <p>An error occurred in '[Unknown]' while attempting to open 'Product.wxs'</p>
  </blockquote>
  
  <p>File Path: D:\Software\CSharp\SetupEesPhotography\SetupEesPhotography\Product.wxs</p>
  
  <p>Frame Model: VSFM_MdiChild</p>
  
  <p>Error Code: 0x80004005</p>