Error 500 when click on check

Hi! Im testing the system! but when i click on check availability i have Internal Server Error. Any advice?

Issue says:

20140318T143935: mysite.com.ar/index.php
PHP Fatal error: Call to a member function get() on a non-object in /hermes/bosnaweb03a/b2751/ipg.exportphonecom/pickbs/websclientes/latel/templates/citylife/layouts/default/layout.php on line 15

First lines of that file:
<?php
/*
CityLife template for Joomla!
Commercial Software
Copyright 2013 joomlaxtc.com
All Rights Reserved
www.joomlaxtc.com
*/
defined( '_JEXEC' ) or die;

JHtml::_('behavior.framework');$document =JFactory::getDocument();
$app = JFactory::getApplication();
$menu = $app->getMenu()->getActive();

$pageclass = $menu->params->get('pageclass_sfx');
$pageview = xtcIsFrontpage() ? 'frontpage' : 'innerpage';
$user =JFactory::getUser();
$params = $templateParameters->group->$layout; // We got $layout from the index.php
// Use the Grid parameters to compute the main columns width
$grid = $params->xtcgrid;
$style = $params->xtcstyle;
$typo = $params->xtctypo;
$css3 = $params->xtccss3;

Thanks in advance!!