Fatal error: Uncaught Error: Class "Symfony\Component\Serializer\Tests\Fixtures\TraversableDummy" not found in /home/yrdsb11w3creativ/public_html/yrdsb/vendor/symfony/serializer/Tests/Fixtures/NormalizableTraversableDummy.php:19 Stack trace: #0 {main} thrown in /home/yrdsb11w3creativ/public_html/yrdsb/vendor/symfony/serializer/Tests/Fixtures/NormalizableTraversableDummy.php on line 19