Fatal error: Uncaught Error: Class "Symfony\Component\Serializer\Normalizer\AbstractNormalizer" not found in /var/www/html/casavio-qa2.das24.it/httpdocs/laravel/vendor/symfony/serializer/Normalizer/JsonSerializableNormalizer.php:22 Stack trace: #0 {main} thrown in /var/www/html/casavio-qa2.das24.it/httpdocs/laravel/vendor/symfony/serializer/Normalizer/JsonSerializableNormalizer.php on line 22