Fatal error: Uncaught Error: Class 'Whoops\Handler\Handler' not found in D:\xampp\htdocs\vendor\filp\whoops\src\Whoops\Handler\PrettyPageHandler.php:18 Stack trace: #0 {main} thrown in D:\xampp\htdocs\vendor\filp\whoops\src\Whoops\Handler\PrettyPageHandler.php on line 18