Fatal error: Uncaught Error: Class 'PhpOffice\PhpSpreadsheet\Style\Supervisor' not found in C:\xampp7\htdocs\edgpens\extension\PhpSpreadsheet-master\src\PhpSpreadsheet\Style\Protection.php:5 Stack trace: #0 {main} thrown in C:\xampp7\htdocs\edgpens\extension\PhpSpreadsheet-master\src\PhpSpreadsheet\Style\Protection.php on line 5