I am getting a blank screen when I run Jomres

From Jomres v4 manual

Sometimes also known as 500 errors.

If this happens then display_errors in your php.ini has been set to Off. This means that the php script has met a fatal error and stopped running. The only way to figure out what has happened is to view your php error log.

The php error log can typically be seen if you go to your hosting's control panel. You need to look for an icon/menu option that refers to either error logs, or sometimes raw logs. You can then search for an error that occurred at the time you saw the blank screen. If the error refers to one of the Jomres files then please get in touch with us by raising a support ticket and we'll investigate the problem with you.