Fatal error: Uncaught Error: Class 'PhpOffice\PhpSpreadsheet\Style\Supervisor' not found in C:\xampp\htdocs\secondary_sales1\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Style\NumberFormat.php:9 Stack trace: #0 {main} thrown in C:\xampp\htdocs\secondary_sales1\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Style\NumberFormat.php on line 9