Fatal error: Uncaught Error: Interface "Symfony\Component\Security\Core\Role\RoleHierarchyInterface" not found in I:\www\picman\vendor\symfony\security-core\Role\RoleHierarchy.php:19 Stack trace: #0 {main} thrown in I:\www\picman\vendor\symfony\security-core\Role\RoleHierarchy.php on line 19