Fatal error: Uncaught Error: Class "Symfony\Component\Validator\Mapping\Loader\AnnotationLoader" not found in /home/alotaishan/public_html/ots001/vendor/symfony/validator/Mapping/Loader/AttributeLoader.php:21 Stack trace: #0 {main} thrown in /home/alotaishan/public_html/ots001/vendor/symfony/validator/Mapping/Loader/AttributeLoader.php on line 21