Fatal error: Uncaught Error: Class 'Symfony\Component\EventDispatcher\Event' not found in /home/lafaamicps/www/symfony/vendor/presta/sitemap-bundle/Presta/SitemapBundle/Event/SitemapPopulateEvent.php:21 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/presta/sitemap-bundle/Presta/SitemapBundle/Event/SitemapPopulateEvent.php on line 21