Fatal error: Uncaught Error: Class 'PhpOffice\PhpSpreadsheet\Style\Supervisor' not found in E:\xampp\htdocs\www\qr251\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Style\Style.php:11 Stack trace: #0 {main} thrown in E:\xampp\htdocs\www\qr251\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Style\Style.php on line 11