It's possible to use saveAs() after exportToXLSX() to save the exported excel files on your server, just like exportToExcel().

Did you try toBrowser("report.pdf") first to see if the file exported correctly? If the file did export,there could be a permission problem with the path you tried to save the file as. Please make sure that your php user on your server has the write permission for that path.

Please try to run this php script to see if it works on your server:

<?php
//testCopy.php
        if(copy($pathOfExistedFile, $pathToSaveAsFile)) {
            echo "Can copy to $pathToSaveAsFile";
        } else {
            echo "Can NOT copy to $pathToSaveAsFile";
        }

Let us know the result. Thanks!

The exported file is created on your server where you host koolreport. saveAs($path) just copies the created file to your desired path. There's no upload here. toBrowser($name) is downloading the created file to your browser. If toBrowser() works while saveAs() doesn't it means that the file is created but can not be copy to your path on server.