Fatal error: Uncaught Error: Class "Doctrine\Persistence\Event\LifecycleEventArgs" not found in /home2/santhos2/public_html/kannan.firstmatrix.in.net/core/vendor/doctrine/persistence/src/Persistence/Event/PreUpdateEventArgs.php:18 Stack trace: #0 {main} thrown in /home2/santhos2/public_html/kannan.firstmatrix.in.net/core/vendor/doctrine/persistence/src/Persistence/Event/PreUpdateEventArgs.php on line 18