Upgrading from osTicket 1.9.3 to 1.10.CentOS release 6.5 (Final)mysql-server version: 5.1.71 php-version: 5.3.3apache version: 2.2.15 Client interface shows:Fatal error: Only variables can be passed by reference in /var/www/sites/helpdesk/include/class.plugin.php on line 555 Call Stack: 0.0002 654048 1. {main}() /var/www/sites/helpdesk/index.php 0.0003 694680 2. require('/var/www/sites/helpdesk/client.inc.php') /var/www/sites/helpdesk/index.php 0.0004 719384 3. require_once('/var/www/sites/helpdesk/main.inc.php') /var/www/sites/helpdesk/client.inc.php 0.0010 944920 4. require('/var/www/sites/helpdesk/bootstrap.php') /var/www/sites/helpdesk/main.inc.php 0.0016 1209104 5. require('/var/www/sites/helpdesk/include/clAdmin interface shows:Parse error: syntax error, unexpected '[', expecting ')' in /var/www/sites/helpdesk/scp/tickets.php on line 33 Call Stack: 0.0006 627000 1. {main}() /var/www/sites/helpdesk/scp/index.php