Fatal error: Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Style\Supervisor" not found in D:\xampp\htdocs\express\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Style\Color.php:7 Stack trace: #0 {main} thrown in D:\xampp\htdocs\express\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Style\Color.php on line 7