Fatal error: Uncaught Error: Class 'League\Fractal\TransformerAbstract' not found in /var/www/html/navirre.com/htdocs/concrete/src/File/ExternalFileTransformer.php:7 Stack trace: #0 {main} thrown in /var/www/html/navirre.com/htdocs/concrete/src/File/ExternalFileTransformer.php on line 7