We know that many people are having issues with the IIF sync with 2019. The good news is that we have an alternative solution that will allow you sync the old way.
When you receive the following window, do not click the blue Import IIF button, but rather, click the "Import it for me. I'll fix it later" link at the bottom.
By clicking this link it will process the IIF the old way, or the way that always worked in 2018 and earlier version.
Please use this method and if you have any issues, please don't hesitate to contact us.