Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in /usr/home/shi561/domains/tc.shi.ip-ddns.com/public_html/vendor/symfony/mailer/Event/MessageEvent.php:23
Stack trace:
#0 {main}
  thrown in /usr/home/shi561/domains/tc.shi.ip-ddns.com/public_html/vendor/symfony/mailer/Event/MessageEvent.php on line 23