Fatal error: Uncaught Error: Interface "Symfony\Component\Serializer\SerializerInterface" not found in /home/yrdsb11w3creativ/public_html/109/vendor/symfony/serializer/Debug/TraceableSerializer.php:29 Stack trace: #0 {main} thrown in /home/yrdsb11w3creativ/public_html/109/vendor/symfony/serializer/Debug/TraceableSerializer.php on line 29