Fatal error: Uncaught Error: Interface 'Symfony\Contracts\Service\ServiceProviderInterface' not found in /home/devmecseminars/public_html/mec/vendor/symfony/dependency-injection/ServiceLocator.php:27 Stack trace: #0 {main} thrown in /home/devmecseminars/public_html/mec/vendor/symfony/dependency-injection/ServiceLocator.php on line 27