Fatal error: Uncaught Error: Class 'Symfony\Component\Validator\Mapping\Loader\FilesLoader' not found in /home/soh-works/www/3good_old/vendor/symfony/validator/Mapping/Loader/XmlFilesLoader.php:22 Stack trace: #0 {main} thrown in /home/soh-works/www/3good_old/vendor/symfony/validator/Mapping/Loader/XmlFilesLoader.php on line 22