Fatal error: Uncaught Error: Class "Symfony\Component\DependencyInjection\Argument\IteratorArgument" not found in I:\www\picman\vendor\symfony\dependency-injection\Argument\TaggedIteratorArgument.php:19 Stack trace: #0 {main} thrown in I:\www\picman\vendor\symfony\dependency-injection\Argument\TaggedIteratorArgument.php on line 19