Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\DataCollector\DataCollector' not found in /home/devmecseminars/public_html/mec/vendor/symfony/validator/DataCollector/ValidatorDataCollector.php:30 Stack trace: #0 {main} thrown in /home/devmecseminars/public_html/mec/vendor/symfony/validator/DataCollector/ValidatorDataCollector.php on line 30