Fatal error: Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Calculation\Database\DatabaseAbstract" not found in /var/www/erp/PhpSpreadsheet-master/src/PhpSpreadsheet/Calculation/Database/DVarP.php:7
Stack trace:
#0 {main}
thrown in /var/www/erp/PhpSpreadsheet-master/src/PhpSpreadsheet/Calculation/Database/DVarP.php on line 7