Fatal error: Uncaught Error: Class "Symfony\Component\Yaml\Exception\RuntimeException" not found in D:\NTG_App\www\My_Personal\PCM\vendor\symfony\yaml\Exception\ParseException.php:19 Stack trace: #0 {main} thrown in D:\NTG_App\www\My_Personal\PCM\vendor\symfony\yaml\Exception\ParseException.php on line 19