From your output command I see that it used the system tmp directory (/tmp). Pls test the following solutions:

1 . Use "useLocalTempFolder" in export setting and point it to your public/html's tmp dir like this:

    $report->export("SalesQuartersPdf")
        ->settings(array(
            'useLocalTempFolder' => 'path/to/public/html/tmp',
        ))
        ->pdf(array(...))

2 . Don't set "useLocalTempFolder" (export uses system tmp dir by default) and add read and write permissions of system tmp for your www user.

Let us know the result. Tks,

Oh, I did see the pivot table content in your pdf screenshot. Is there anything that I missed here?

Pls try these tests:

1 . Use only a simple string in your report pdf view such as "Hello world" to export to pdf and see if it shows.

2 . If it does, try to set property "initVisible" => true for PivotTable widget in your report pdf view:

//MyReportPdf.view.php
PivotTable::create(array(
    ...
    "initVisible" => true,
));

Let us know the result. Tks,

Ok, pls open the file 'koolreport/export/Handler.php' and find the following line:

        $result = shell_exec($command); 

and replace it with these ones:

        echo "command = $command<br>"; exit;
        $result = shell_exec($command);

Then export your report to see the echoed command. Copy the command and paste it into the server's command line/terminal to see how it runs.

They have been removed per your request.