Fatal error: Uncaught Error: Interface 'Symfony\Component\EventDispatcher\EventSubscriberInterface' not found in D:\xampp\htdocs\psp\backend\vendor\symfony\http-kernel\EventListener\LocaleListener.php:30
Stack trace:
#0 {main}
thrown in D:\xampp\htdocs\psp\backend\vendor\symfony\http-kernel\EventListener\LocaleListener.php on line 30