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