Fatal error: Uncaught Error: Class 'Symfony\Component\Uid\Ulid' not found in E:\xampp\htdocs\www\yunwei\qr250\vendor\symfony\uid\NilUlid.php:14 Stack trace: #0 {main} thrown in E:\xampp\htdocs\www\yunwei\qr250\vendor\symfony\uid\NilUlid.php on line 14