Fatal error: Uncaught Error: Class "Symfony\Component\TypeInfo\Type\UnionType" not found in /home/vulcans/new-v2/vendor/symfony/type-info/Type/NullableType.php:27 Stack trace: #0 {main} thrown in /home/vulcans/new-v2/vendor/symfony/type-info/Type/NullableType.php on line 27