Fatal error: Uncaught Error: Class "PHPExcel_Style_Supervisor" not found in C:\web\xampp02\htdocs\EasyTec\excel01\Classes\PHPExcel\Style\Protection.php:28 Stack trace: #0 {main} thrown in C:\web\xampp02\htdocs\EasyTec\excel01\Classes\PHPExcel\Style\Protection.php on line 28