Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\DependencyInjection\Extension' not found in /home/lafaamicps/www/symfony/vendor/presta/sitemap-bundle/Presta/SitemapBundle/DependencyInjection/PrestaSitemapExtension.php:23 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/presta/sitemap-bundle/Presta/SitemapBundle/DependencyInjection/PrestaSitemapExtension.php on line 23