Fatal error: Uncaught Error: Interface "Symfony\Component\EventDispatcher\EventSubscriberInterface" not found in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\http-kernel\EventListener\StreamedResponseListener.php:27
Stack trace:
#0 {main}
thrown in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\http-kernel\EventListener\StreamedResponseListener.php on line 27