Поиск источника ошибки

<?php
/** 
 * @package JMAP::SITEMAP::components::com_jmap
 * @subpackage views
 * @subpackage sitemap
 * @subpackage tmpl
 * @author Joomla! Extensions Store
 * @copyright (C) 2015 - Joomla! Extensions Store
 * @license GNU/GPLv2 http://www.gnu.org/licenses/gpl-2.0.html
 */
defined ( '_JEXEC' ) or die ( 'Restricted access' );
 
echo "<?xmlversion='1.0' encoding='UTF-8'?>". PHP_EOL;
if($this->xslt) {
    echo "<?xml-stylesheet type='text/xsl' href='" . JUri::root()."components/com_jmap/xslt/xml-sitemap.xsl'?>".PHP_EOL;
}
?>
<urlset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd">
<?php
foreach ( $this->data as $source ) {    
    // Strategy pattern source type template visualization
    if ($source->type) {
        $this->source = $source;
        $this->sourceparams = $source->params;
        $this->asCategoryTitleField = $this->findAsCategoryTitleField($source);
        if($this->sourceparams->get('xmlinclude', 1)) {
            $subTemplateName = $this->_layout . '_xml_' . $source->type . '.php';
            if (file_exists ( JPATH_COMPONENT_SITE . '/views/sitemap/tmpl/' . $subTemplateName )) {
                echo $this->loadTemplate ( 'xml_' . $source->type );
            }
        }
    }
}
?>
</urlset>