I am trying to get output by using codeigniter view $this->load->view() instead of koolreport (page.view.php)

I am using below code but getting an error Undefined index: __ACTIVE_KOOLREPORT__

Controller

	public function get_payment_type_by_date($type = NULL)
    {
			
		## Sending data(dbname, base_url) to payment class
				$report = new Payment(array(
				"dbname" => "database1",
				"from"=>$this->input->post('from'),
				"to"=>$this->input->post('to'),
				'base_url' => base_url()
				));

				$report->run();

		## Sending report data to page using codeigniter view functionality

				$data = array(
					'title' => 'Payment Report',
					'page_name' => 'reports/payment_report',
					'report'=> $report
				);

				$this->load->view('index', $data);
			
	}