Fatal error: Uncaught Error: Call to undefined function Symfony\Component\EventDispatcher\trigger_deprecation() in C:\xampp\htdocs\admin\vendor\symfony\event-dispatcher\LegacyEventDispatcherProxy.php:16 Stack trace: #0 {main} thrown in C:\xampp\htdocs\admin\vendor\symfony\event-dispatcher\LegacyEventDispatcherProxy.php on line 16