Fatal error: Interface 'Symfony\Component\EventDispatcher\EventDispatcherInterface' not found in /var/www/html/dev/spa/vendor/symfony/event-dispatcher/Symfony/Component/EventDispatcher/EventDispatcher.php on line 31

Call Stack:
    0.0007     264952   1. {main}() /var/www/html/dev/spa/vendor/symfony/event-dispatcher/Symfony/Component/EventDispatcher/EventDispatcher.php:0