Fatal error: Uncaught Error: Class 'PHPExcel_Style_Supervisor' not found in C:\xampp\htdocs\aroflo-dataforce\vendor\phpoffice\phpexcel\Classes\PHPExcel\Style.php:28 Stack trace: #0 {main} thrown in C:\xampp\htdocs\aroflo-dataforce\vendor\phpoffice\phpexcel\Classes\PHPExcel\Style.php on line 28