Fatal error: Uncaught Error: Interface 'Exporter\Source\SourceIteratorInterface' not found in /home/lafaamicps/www/symfony/vendor/sonata-project/exporter/lib/Exporter/Source/SymfonySitemapSourceIterator.php:15 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/sonata-project/exporter/lib/Exporter/Source/SymfonySitemapSourceIterator.php on line 15