Fatal error: Uncaught Error: Interface 'Symfony\Component\HttpKernel\DataCollector\DataCollectorInterface' not found in /home/devmecseminars/public_html/mec/vendor/symfony/http-kernel/DataCollector/DataCollector.php:29 Stack trace: #0 {main} thrown in /home/devmecseminars/public_html/mec/vendor/symfony/http-kernel/DataCollector/DataCollector.php on line 29