You may receive the following error when you try to export a report to PDF.
There was an error generating the PDF. HTML render is blank.
Please check if Internet Explorer 9 is installed on the server where EP site is running, and if so then uninstall it (i.e. roll-back to IE 8.0).
Note. Windows 8 and Windows Server 2012 (come by default with IE 10) are not supported.