Fatal error: Uncaught Error: Interface "Symfony\Component\Serializer\Mapping\ClassDiscriminatorResolverInterface" not found in /var/www/html/casavio-qa2.das24.it/httpdocs_old/laravel/vendor/symfony/serializer/Mapping/ClassDiscriminatorFromClassMetadata.php:19 Stack trace: #0 {main} thrown in /var/www/html/casavio-qa2.das24.it/httpdocs_old/laravel/vendor/symfony/serializer/Mapping/ClassDiscriminatorFromClassMetadata.php on line 19