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