Fatal error: Uncaught Error: Class 'Symfony\Component\Validator\Mapping\Loader\AbstractLoader' not found in /var/www/drupal/sites/energiatalgud/vendor/symfony/validator/Mapping/Loader/FileLoader.php:24 Stack trace: #0 {main} thrown in /var/www/drupal/sites/energiatalgud/vendor/symfony/validator/Mapping/Loader/FileLoader.php on line 24