In this article, we will create a simple approval workflow in which approver is selected dynamically from another list using Sharepoint Designer 2013. We will implement the following approver hierarchy:

I installed Sharepoint Designer 2013 and tried to create SharePoint 2013 workflow but there was no option to select platform type as “Sharepoint 2013 Workflow” and getting the following message in SharePoint Designer 2013:

"The option for the SharePoint 2013 Workflow platform is not available because the workflow service is not configured on the server. Please contact your server administrator"