Fatal error: Uncaught Error: Class "Symfony\Component\Serializer\Normalizer\AbstractNormalizer" not found in /home/.sites/114/site713/web/energiepackung2024/vendor/symfony/serializer/Normalizer/JsonSerializableNormalizer.php:24
Stack trace:
#0 {main}
  thrown in /home/.sites/114/site713/web/energiepackung2024/vendor/symfony/serializer/Normalizer/JsonSerializableNormalizer.php on line 24