Fatal error: Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Chart\Properties" not found in D:\xampp\htdocs\phpOffice\PhpSpreadsheet\Chart\DataSeriesValues.php:10 Stack trace: #0 {main} thrown in D:\xampp\htdocs\phpOffice\PhpSpreadsheet\Chart\DataSeriesValues.php on line 10