Fatal error: Uncaught Error: Interface "Symfony\Component\EventDispatcher\EventSubscriberInterface" not found in /usr/home/jiexusheng/domains/linuxdo.isgre.at/public_html/vendor/symfony/mailer/EventListener/MessageListener.php:28
Stack trace:
#0 {main}
  thrown in /usr/home/jiexusheng/domains/linuxdo.isgre.at/public_html/vendor/symfony/mailer/EventListener/MessageListener.php on line 28