SharePoint Designer shows up blank workflows in text-based view

You have workflows associated with list or libraries, and everything works fine, except the possibility to edit all those conditions and actions in SharePoint Designer 2013?

If you click “edit workflow”, none of the workflow steps show up – instead you see a blank page with “insert a stage by using the stage button on the ribbon”. Yes, the problem is related to SPD client and all you have to do is to install the following update from Microsoft site: