UI action not working in workspace

[pk2184046]

Hi all,

    function downloadPDF() {

    var ga = new GlideAjax('sn_hr_core.GSSPDownloadpdf'); // Script Include name

    ga.addParam('sysparm_name', 'generatePDF');

    ga.addParam('sys_id', g_form.getUniqueValue()); // Current record sys_id

    ga.addParam('template_id', 'aa3586312b017a508e43f95fee91bf90'); // Template sys_id

    ga.addParam('pdf_name', 'Online Template.pdf');

    // g_form.showFieldMsg('downloadPDF', 'Generating PDF, please wait...', 'info');

    ga.getXMLAnswer(function(response) {

        if (response) {

                // g_form.save();

            var downloadUrl = '/sys_attachment.do?sys_id=' + response;

            window.location.href = downloadUrl; // Trigger download

                location.reload();

        } else {

            alert('Failed to generate PDF.');

        }

    });

}

I'm using the above code to generate a pdf in the hr task which is working in native UI but in the HR agent workspace it is not working. Workspace form button is checked true
workspace code

    function downloa

function onClick(g_form) {

    var ga = new GlideAjax('sn_hr_core.GSSPDownloadpdf'); // Script Include name

    ga.addParam('sysparm_name', 'generatePDF');

    ga.addParam('sys_id', g_form.getUniqueValue()); // Current record sys_id

    ga.addParam('template_id', 'aa3586312b017a508e43f95fee91bf90'); // Template sys_id

    ga.addParam('pdf_name', 'Online Template.pdf');

    // g_form.showFieldMsg('downloadPDF', 'Generating PDF, please wait...', 'info');

    ga.getXMLAnswer(function(response) {

        if (response) {

                // g_form.save();

            var downloadUrl = '/sys_attachment.do?sys_id=' + response;

            window.location.href = downloadUrl; // Trigger download

                location.reload();

        } else {

            alert('Failed to generate PDF.');

        }

    });

}

@Ankur Bawiskar can you please help
Pasting the script include

var GSSPDownloadpdf = Class.create();

GSSPDownloadpdf.prototype = Object.extendsObject(global.AbstractAjaxProcessor, {

    generatePDF: function() {

   var recordId = this.getParameter('sys_id');

        var templateId = this.getParameter('template_id');

        var pdfName = this.getParameter('pdf_name');

        var attachmentSysId = new sn_doc.GenerateDocumentAPI()

            .generateDocumentForTask(recordId, templateId, pdfName);

        return attachmentSysId; // Return the sys_id of the attachment

    },

    type: 'GSSPDownloadpdf'

});