Fatal error: Uncaught Error: Class 'Symfony\Component\Form\AbstractTypeExtension' not found in D:\workspaces\liZiPingBack\vendor\nelmio\api-doc-bundle\Form\Extension\DocumentationExtension.php:22 Stack trace: #0 {main} thrown in D:\workspaces\liZiPingBack\vendor\nelmio\api-doc-bundle\Form\Extension\DocumentationExtension.php on line 22