Fatal error: Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Writer\Xlsx\WriterPart" not found in D:\xampp\htdocs\phpOffice\PhpSpreadsheet\Writer\Xlsx\Drawing.php:15 Stack trace: #0 {main} thrown in D:\xampp\htdocs\phpOffice\PhpSpreadsheet\Writer\Xlsx\Drawing.php on line 15