Fatal error: Uncaught Error: Class "Symfony\Component\EventDispatcher\Event" not found in /var/www/unitedcomputerservice.com/htdocs/wp-content/plugins/gantry5/vendor/rockettheme/toolbox/Event/src/Event.php:18 Stack trace: #0 {main} thrown in /var/www/unitedcomputerservice.com/htdocs/wp-content/plugins/gantry5/vendor/rockettheme/toolbox/Event/src/Event.php on line 18