Fatal error: Uncaught Error: Interface 'Exporter\Writer\WriterInterface' not found in /home/lafaamicps/www/symfony/vendor/sonata-project/exporter/lib/Exporter/Writer/JsonWriter.php:14 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/sonata-project/exporter/lib/Exporter/Writer/JsonWriter.php on line 14