Fatal error: Uncaught Error: Class 'Symfony\Component\Serializer\Normalizer\AbstractNormalizer' not found in C:\xampp\htdocs\ApiSigestWin\1.20.01.27.5\vendor\symfony\serializer\Normalizer\AbstractObjectNormalizer.php:34 Stack trace: #0 {main} thrown in C:\xampp\htdocs\ApiSigestWin\1.20.01.27.5\vendor\symfony\serializer\Normalizer\AbstractObjectNormalizer.php on line 34