I got the error

Uncaught Error: Class 'PhpOffice\PhpSpreadsheet\IOFactory' not found in ...\vendor\koolreport\core\src\excel\ExcelDataSource.php:91.

this is my calling:

use \koolreport\excel\ExcelDataSource;
class saleReport extends \koolreport\koolreport
{
    use \koolreport\clients\jQuery;
    use \koolreport\clients\Bootstrap;
    use \koolreport\clients\BootstrapCSS;
    
    public function settings()
    {
        return array(
            "dataSources" => array(
                "check"=>array(
                    'filePath' => 'excel-data.xlsx',
                     "class"=>ExcelDataSource::class,     
                ), 
            )
        );
    }

    protected function setup()
    {
        $this->src("check")
        ->pipe($this->dataStore("check"));

    }
}

Hey i followed the steps exactly , still i get the same error. also just to be sure, i have kept excel folder here \vendor\koolreport\core\src. its supposed to be here only na?

Thanks.