Fatal error: Uncaught Error: Class 'PHPExcel_Shared_OLE_PPS' not found in /opt/lampp/htdocs/classes/PHPExcel/Shared/OLE/PPS/Root.php:30 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/classes/PHPExcel/Shared/OLE/PPS/Root.php on line 30