Fatal error: Uncaught Error: Class 'Symfony\Component\Serializer\Normalizer\AbstractNormalizer' not found in /var/www/drupal/sites/energiatalgud/vendor/symfony/serializer/Normalizer/AbstractObjectNormalizer.php:35 Stack trace: #0 {main} thrown in /var/www/drupal/sites/energiatalgud/vendor/symfony/serializer/Normalizer/AbstractObjectNormalizer.php on line 35