If there is an error in Feng Office you typically get a blank screen. Before asking the community for help please make sure that you have activated debugging mode which usually will provide a detailed error message, either on screen or in the log file (cache/log.php).

WARNING: The debugging mode can reveal information about your Feng Office installation that is for your eyes only, so it should be switched off whenever possible.

To turn debugging on you have to change the DEBUG constant in the file config/config.php from

define('DEBUG', false); 


define('DEBUG', true);