Fatal error: Uncaught Error: Class "Metadata\Driver\AbstractFileDriver" not found in /var/www/crm_killing_ninja/vendor/vich/uploader-bundle/src/Metadata/Driver/AbstractYamlDriver.php:14 Stack trace: #0 {main} thrown in /var/www/crm_killing_ninja/vendor/vich/uploader-bundle/src/Metadata/Driver/AbstractYamlDriver.php on line 14