Fatal error: Uncaught Error: Class 'Whoops\Handler\Handler' not found in E:\xampp\htdocs\vendor\filp\whoops\src\Whoops\Handler\PlainTextHandler.php:20 Stack trace: #0 {main} thrown in E:\xampp\htdocs\vendor\filp\whoops\src\Whoops\Handler\PlainTextHandler.php on line 20