Fatal error: Uncaught Error: Class "Symfony\Component\Form\AbstractType" not found in /home/zdpktgd/ptc/vendor/symfony/ux-dropzone/src/Form/DropzoneType.php:23 Stack trace: #0 {main} thrown in /home/zdpktgd/ptc/vendor/symfony/ux-dropzone/src/Form/DropzoneType.php on line 23