SharePoint User Profile Search Error: Property does not exist or is used in a manner inconsistent with schema settings

INTRODUCTION I just upgraded my SharePoint 2010 site to SharePoint 2013. One of the functionalities that my SharePoint 2010 site had was People search. The restore to SP 2013 was successful. However, when I tried to do People search the Core Search Results web-part displays the following error message: Property does not exist or is […]