Insert Picture or Link From SharePoint 2010/2013, Nothing Happens, Pop-up Not Displayed

INTRODUCTION I have a SharePoint 2010 site running in 2013 farm (ie. 2010 mode). Somehow the “Insert Picture from SharePoint” or “Insert Link from SharePoint” button in the ribbon bar stops working. It simply didn’t do anything when I clicked it. I tried to turn on Javascript error but there was nothing related. I have […]