Fatal error: Uncaught Error: Class 'Vich\UploaderBundle\Handler\AbstractHandler' not found in C:\xampp\htdocs\ApiSigestWin\1.0\vendor\vich\uploader-bundle\Handler\UploadHandler.php:20 Stack trace: #0 {main} thrown in C:\xampp\htdocs\ApiSigestWin\1.0\vendor\vich\uploader-bundle\Handler\UploadHandler.php on line 20