Fatal error: Uncaught Error: Class 'PhpOffice\PhpSpreadsheet\Chart\Properties' not found in E:\xampp\htdocs\www\qr251\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Chart\DataSeriesValues.php:10 Stack trace: #0 {main} thrown in E:\xampp\htdocs\www\qr251\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Chart\DataSeriesValues.php on line 10