Fatal error: Uncaught Error: Class "PHPExcel_Chart_Properties" not found in C:\web\xampp02\htdocs\EasyTec\excel01\Classes\PHPExcel\Chart\GridLines.php:10 Stack trace: #0 {main} thrown in C:\web\xampp02\htdocs\EasyTec\excel01\Classes\PHPExcel\Chart\GridLines.php on line 10