Fatal error: Uncaught Error: Class "Vich\UploaderBundle\Metadata\Driver\AbstractYamlDriver" not found in /home/astechc1/public_html/vendor/vich/uploader-bundle/src/Metadata/Driver/YamlDriver.php:5 Stack trace: #0 {main} thrown in /home/astechc1/public_html/vendor/vich/uploader-bundle/src/Metadata/Driver/YamlDriver.php on line 5