2 answers
Yes. Iframe is not working properly. Please check below post:-https://help.salesforce.com/apex/HTViewSolution?urlname=IFRAME-or-Web-Tab-Content-Displays-Blank-Page-1327107637323Please let us know if this will help you Hi Amit.Appears that it is the Clickjack issue that has stopped the iFrame working. There is an admin setting that can potentially resolve our companys issue.For info - it is located in Admin Settings>Session Settings. You need to make a request to Salesforce to have the option disabled Enable clickjack protection for non-setup Salesforce pages
Thanks for your helpMark Barclay