Fatal error: Uncaught Error: Class 'Presta\SitemapBundle\Sitemap\XmlConstraint' not found in /home/lafaamicps/www/symfony/vendor/presta/sitemap-bundle/Presta/SitemapBundle/Sitemap/Urlset.php:18 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/presta/sitemap-bundle/Presta/SitemapBundle/Sitemap/Urlset.php on line 18