Fatal error: Uncaught Error: Interface "Symfony\Component\Serializer\Normalizer\NormalizerInterface" not found in /var/www/crm_killing_ninja/vendor/symfony/serializer/Normalizer/DataUriNormalizer.php:28 Stack trace: #0 {main} thrown in /var/www/crm_killing_ninja/vendor/symfony/serializer/Normalizer/DataUriNormalizer.php on line 28