Fatal error: Uncaught Error: Interface 'Psr\EventDispatcher\EventDispatcherInterface' not found in C:\xampp\htdocs\admin\vendor\symfony\event-dispatcher-contracts\EventDispatcherInterface.php:19
Stack trace:
#0 {main}
thrown in C:\xampp\htdocs\admin\vendor\symfony\event-dispatcher-contracts\EventDispatcherInterface.php on line 19