Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in /home/exklusivbeautysa/public_html/vendor/contao/newsletter-bundle/src/Event/SendNewsletterEvent.php:17
Stack trace:
#0 {main}
thrown in /home/exklusivbeautysa/public_html/vendor/contao/newsletter-bundle/src/Event/SendNewsletterEvent.php on line 17