Fatal error: Uncaught Error: Call to undefined function Symfony\Component\EventDispatcher\trigger_deprecation() in D:\Apache24\www\trace\新建文件夹\Backstage\vendor\symfony\event-dispatcher\LegacyEventDispatcherProxy.php:16 Stack trace: #0 {main} thrown in D:\Apache24\www\trace\新建文件夹\Backstage\vendor\symfony\event-dispatcher\LegacyEventDispatcherProxy.php on line 16