Fatal error: Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Shared\Trend\BestFit" not found in D:\xampp\htdocs\vendor\phpoffice\phpspreadsheet\Shared\Trend\PolynomialBestFit.php:14 Stack trace: #0 {main} thrown in D:\xampp\htdocs\vendor\phpoffice\phpspreadsheet\Shared\Trend\PolynomialBestFit.php on line 14