Fatal error: Class 'Symfony\Component\EventDispatcher\Event' not found in /var/www/html/dev/spa/vendor/symfony/console/Symfony/Component/Console/Event/ConsoleEvent.php on line 25

Call Stack:
    0.0003     236704   1. {main}() /var/www/html/dev/spa/vendor/symfony/console/Symfony/Component/Console/Event/ConsoleEvent.php:0