We have recently started seeing issues with the edit functionality for pdf files in our media libraries. Suddenly when trying to load the editor we get a chrome error that the page took too long to load. We are getting the following error in the Chrome console:
Uncaught DOMException: Blocked a frame with origin "[CMS Admin Domain]" from accessing a cross-origin frame. at u ([CMS Admin Domain]/CMSPages/GetResource.ashx?scriptmodule=/CMS/AdvancedPopupHandler.js:1:6437) at Object.f [as stopPropagation] ([CMS Admin Domain]/CMSPages/GetResource.ashx?scriptmodule=/CMS/AdvancedPopupHandler.js:1:6472) at HTMLIFrameElement.