Fatal error: Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Calculation\CalculationLocale" not found in D:\xampp\htdocs\vendor\phpoffice\phpspreadsheet\Calculation\Calculation.php:26 Stack trace: #0 {main} thrown in D:\xampp\htdocs\vendor\phpoffice\phpspreadsheet\Calculation\Calculation.php on line 26