Fatal error: Uncaught Error: Class 'Symfony\Component\Serializer\Normalizer\ObjectNormalizer' not found in C:\xampp\htdocs\ApiSigestWin\1.20.01.20.4\vendor\symfony\serializer\Tests\Fixtures\StaticConstructorNormalizer.php:19 Stack trace: #0 {main} thrown in C:\xampp\htdocs\ApiSigestWin\1.20.01.20.4\vendor\symfony\serializer\Tests\Fixtures\StaticConstructorNormalizer.php on line 19