Fatal error: Uncaught Error: Interface 'Symfony\Component\Validator\Mapping\Loader\LoaderInterface' not found in /home/devmecseminars/public_html/mec/vendor/symfony/validator/Mapping/Loader/AnnotationLoader.php:27 Stack trace: #0 {main} thrown in /home/devmecseminars/public_html/mec/vendor/symfony/validator/Mapping/Loader/AnnotationLoader.php on line 27