Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\DataCollector\DataCollector' not found in D:\xampp\htdocs\psp\backend\vendor\symfony\http-kernel\DataCollector\EventDataCollector.php:27 Stack trace: #0 {main} thrown in D:\xampp\htdocs\psp\backend\vendor\symfony\http-kernel\DataCollector\EventDataCollector.php on line 27