Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in /usr/home/jiexusheng/domains/linuxdo.isgre.at/public_html/vendor/symfony/console/Event/ConsoleEvent.php:24
Stack trace:
#0 {main}
  thrown in /usr/home/jiexusheng/domains/linuxdo.isgre.at/public_html/vendor/symfony/console/Event/ConsoleEvent.php on line 24