Fatal error: Uncaught Error: Class 'PHPExcel_Shared_OLE_PPS' not found in C:\xampp\htdocs\BeiDou_website\z\class\Doffice\PHPExcel\Shared\OLE\PPS\File.php:30 Stack trace: #0 {main} thrown in C:\xampp\htdocs\BeiDou_website\z\class\Doffice\PHPExcel\Shared\OLE\PPS\File.php on line 30