Fatal error: Uncaught Error: Interface "Psr\EventDispatcher\StoppableEventInterface" not found in C:\Apache24_x64\htdocs\radar\vendor\symfony\event-dispatcher-contracts\Event.php:31 Stack trace: #0 {main} thrown in C:\Apache24_x64\htdocs\radar\vendor\symfony\event-dispatcher-contracts\Event.php on line 31