Fatal error: Uncaught Error: Class 'Vich\UploaderBundle\Handler\AbstractHandler' not found in /home/cooplafobq/newplanning/vendor/vich/uploader-bundle/Handler/UploadHandler.php:20 Stack trace: #0 {main} thrown in /home/cooplafobq/newplanning/vendor/vich/uploader-bundle/Handler/UploadHandler.php on line 20