Fatal error: Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Shared\Trend\BestFit" not found in C:\xampp\htdocs\contoh\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Shared\Trend\PolynomialBestFit.php:11 Stack trace: #0 {main} thrown in C:\xampp\htdocs\contoh\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Shared\Trend\PolynomialBestFit.php on line 11