Fatal error: Uncaught Error: Class 'PhpOffice\PhpSpreadsheet\Calculation\Statistical\StatisticalValidations' not found in E:\xampp\htdocs\www\order\qr250\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Calculation\Statistical\Standardize.php:9 Stack trace: #0 {main} thrown in E:\xampp\htdocs\www\order\qr250\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Calculation\Statistical\Standardize.php on line 9