Fatal error: Interface 'Symfony\Component\EventDispatcher\EventDispatcherInterface' not found in /var/www/html/dev/spa/vendor/symfony/event-dispatcher/Symfony/Component/EventDispatcher/ImmutableEventDispatcher.php on line 20

Call Stack:
    0.0004     243808   1. {main}() /var/www/html/dev/spa/vendor/symfony/event-dispatcher/Symfony/Component/EventDispatcher/ImmutableEventDispatcher.php:0