Cannot render theme, not yet configured

  public function hasContent(){
    return ($this->_content instanceof Block);
  }
  public function getContent(){
    if($this->_content instanceof Block)
      return $this->_content;      
    
    throw new \Exception('Cannot render theme, not yet configured');
  }
  public function getControlMenu(){
    $menu = new Menu();
    $menu->insert(sprintf('<a href="%s">%s</a>', app()->getUrl(), t('Home')), 100);
    if($this->request->user->can('editOptsBasic'))
      $menu->insert(sprintf('<a href="%s">%s</a>', app()->getUrl('control'), t('Under the Hood')), 80);

    }
    $templates[] = 'block.container';
    $this->render($templates, compact('block', 'asModel'));
    $this->log->info('Rendered zone <%s>', $block->tag);    
  }
  public function renderBlocks($asModel = false){
    $this->renderBlock($this->getContent(), $asModel);
  }
  /**
   * Renders a template file
   *
   * @access  public

 * @Link: http://locations.org 
 * @Last Modified by:   hello@digitalnature.eu
 * @Last Modified time: 2016-10-17 11:41:54
 */
?>
<?php $theme->render('document.head'); ?>
<?php $theme->renderBlocks(); ?>
<?php $theme->render('document.end'); ?>