Error: PHP fatal error contact system administrator in OSticket.

Error: PHP fatal error contact system administrator in OSticket.

Solution:

First Enable Error variable in main.inc.php file as given below. Then it'll show you error.
if($ferror){ //Fatal error
        Sys::alertAdmin('osTicket Fatal Error',$ferror); //try alerting admin.
        die("<b>Fatal Error:</b> Contact system adminstrator:$ferror"); //Generic error.
        exit;

In my case, it shows me the error as  short_open_tag is Off. Please set it on.
To solve that , Open up your /etc/php.ini file and search for short_open_tag and set it to On

short_open_tag = On

Then restart web service.

service httpd restart