Fatal error: Uncaught Error: Class "Symfony\Component\EventDispatcher\GenericEvent" not found in /home/s4b/public_html/dev/cempre/extensions/vendor/bolt/sitemap/src/SitemapEvent.php:8 Stack trace: #0 {main} thrown in /home/s4b/public_html/dev/cempre/extensions/vendor/bolt/sitemap/src/SitemapEvent.php on line 8