Plugin Not Creating PDF

Hello, i have the same problem, still not working for me, I have version 2.2.3 and GF 1.7.2.

I double checked everything, inserted this code in functions.php inside my theme files, before php tag, please take a look. The PDF is not being created neither attached. I used the ID and the tittle when needed. Wrote the notification tittle for the user and the admin:

function gfpdfe_create_and_attach_pdf($notification, $form, $entry)
{

    /*
     * Set the PDF name here or leave blank to use the default.
     * Example: $PDF_name = 'My Custom Document.pdf';
     */
    $PDF_name = 'My Custom Document.pdf';

    /*
     * Use a custom template or leave blank to use the default.
     * The template file needs to be in your active theme's PDF_EXTENDED_TEMPLATES folder before referencing below
     * Example: $custom_template_name = 'my-custom-template.php';
     * Default template options: default-template.php, default-template-two-rows.php, default-template-no-style.php
     */
    $template_name = 'default-template.php';

    /*
     * Set data used to determine if PDF needs to be created and attached to notification
     * Don't change anything here.
     */
    $notification_name = $notification['name'];
    $notification_id   = $notification['id'];
    $form_title        = $form['title'];
    $form_id           = $entry['form_id'];
    $user_id           = $entry['id'];
    $folder_id = $form_id.$user_id.'/';

    /* GENERATE AND EMAIL PDF
     * Do we want to create and send a PDF for this form?
     * You can match the form ID or the form title
     * Example: if($form_id == 2 || $form_title == 'Let me Know What Do You Need')
     */
    if ($form_title == 'Let me Know What Do You Need') {
        /*
         * Get ready to create the PDF file
         */
         require PDF_PLUGIN_DIR . 'render_to_pdf.php';
         $PDF_name          = (strlen($PDF_name) > 0) ? $PDF_name : get_pdf_filename($form_id, $user_id);
         $pdf_arguments     = array(
             'pdfname' => $PDF_name,
             'template' => $template_name,
             'return' => true
         );

        /* generate and save default PDF */
        $filename = PDF_Generator($form_id, $user_id, $pdf_arguments);

        /* ATTACH PDF TO EMAIL
         * As of GF 1.7 notifications aren't limited to admin and user.
         * We now need to match the notification we would like to attach the file to instead of using gform_admin_notification_attachments and gform_user_notification_attachments.
         * You can match against the name of your notification
         * Example: if($notification_name == 'Admin - Notify admin user')
         */
        if ($notification_name == 'Admin Notification' || $notification_name == 'User Notification') {
            $attachment_file               = PDF_SAVE_LOCATION . $folder_id . $PDF_name;
            $notification['attachments'][] = $attachment_file;
        }
    }
    return $notification;
}

add_filter('gform_notification', 'gfpdfe_create_and_attach_pdf', 10, 3);

<?php }
?>

Please help… I couldn’t make this work for me.