We generate a report and there is not show anything in the table, only report structure is visible without data. like bellow pic.

For reference here i mention the code we run.

$jobsheet 		= $this->src('mysql')->query($Query1); // 25796 record
$attandance 	= $this->src('mysql')->query($Query2); // 4392 record
$delimiter = " || ";
$join = new Join($jobsheet,$attandance,array("engg_reassigned_to"=>"engg_reassigned_to"));
$join->pipe(new Pivot2D(array(
	"dimensions"=>array(
		"column" => "dateyear",
		"row" => "users_zone_c, address_state, CSCName,engName",
	),
	"aggregates"=>array(
		"sum" => "ProductiveJS, workingDays, Average",
	),
	"fieldDelimiter" => $delimiter,
))) 
->pipe(new Map(array(
'{value}' => function ($row) use ($delimiter) {
	foreach ($row as $colName => $colValue) {
			$colFields = substr($colName, 0, strrpos($colName, " || "));
			$customAverageColName =  $colFields . " || Average - sum";
			if($customAverageColName!==' || Average - sum'){
				$row[$customAverageColName] = $row[$colFields . " || ProductiveJS - sum"] != 0 ? $row[$colFields . " || ProductiveJS - sum"] / $row[$colFields . " || workingDays - sum"] : 0; 
			}
	}
	return $row; 
},
	'{meta}' => function($meta) {
		$meta['columns']['Average - sum'] = array(
			'type' => 'number',
			'decimals' => 2,
		);
		
			return $meta;
	}
)))
->pipe($this->dataStore('productivity'));

I also try to fix the issue and found that if

$this->dataStore('productivity')->data();

does not return anything then koolreport not show anything. in my case it is not show anything but array(0) { }

buy my both queries are run successfully in sql and give me numbers of record. Please help us to fix this issue

1) When i comment out only Map process process it is still show me array(0) { }

2) when i comment out only Pivot2D process it show me error bellow

3) when i comment out both Map process & Pivot2D process the same error like above image.

Please help us to fix this