Fatal error: Uncaught Error: Interface 'Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface' not found in /home/devmecseminars/public_html/mec/vendor/symfony/serializer/DependencyInjection/SerializerPass.php:26 Stack trace: #0 {main} thrown in /home/devmecseminars/public_html/mec/vendor/symfony/serializer/DependencyInjection/SerializerPass.php on line 26