Fatal error: Uncaught Error: Class 'PhpOffice\PhpSpreadsheet\Calculation\Database\DatabaseAbstract' not found in /var/www/html/portal/phpspreadsheet_exc/src/PhpSpreadsheet/Calculation/Database/DMax.php:7 Stack trace: #0 {main} thrown in /var/www/html/portal/phpspreadsheet_exc/src/PhpSpreadsheet/Calculation/Database/DMax.php on line 7