Fatal error: Uncaught Error: Interface "Symfony\Component\Serializer\SerializerInterface" not found in C:\xampp\htdocs\bilipoa\vendor\symfony\serializer\Debug\TraceableSerializer.php:28 Stack trace: #0 {main} thrown in C:\xampp\htdocs\bilipoa\vendor\symfony\serializer\Debug\TraceableSerializer.php on line 28