Ошибка: 0 Cannot use string offset as an array - Joomla 3.x: Общие вопросы

// set tags
$tags = '';
if ($params->get('show_tags', 1) && !empty($this->item->tags->itemTags)) {
	JLoader::register('TagsHelperRoute', JPATH_BASE . '/components/com_tags/helpers/route.php');
	foreach ($this->item->tags->itemTags as $i => $tag) {
		if (in_array($tag->access, JAccess::getAuthorisedViewLevels(JFactory::getUser()->get('id')))) {
			$tags[$i]['title'] = $this->escape($tag->title);
			$tags[$i]['link'] = '<a href="'.JRoute::_(TagsHelperRoute::getTagRoute($tag->tag_id . ':' . $tag->alias)).'">'.$this->escape($tag->title).'</a>';
		}
	}
}
$args['tags'] = $tags;

$tags[$i]['title'] = $this->escape($tag->title);

Cannot use string offset as an array	
/***/layouts/com_content/article/default.php:436

Call stack
#	Function	Location
1	()	JROOT/templates/***/layouts/com_content/article/default.php:436
2	include()	JROOT/templates/***/html/com_content/article/default.php:12
3	include()	JROOT/libraries/src/MVC/View/HtmlView.php:697
4	Joomla\CMS\MVC\View\HtmlView->loadTemplate()	JROOT/libraries/src/MVC/View/HtmlView.php:230
5	Joomla\CMS\MVC\View\HtmlView->display()	JROOT/components/com_content/views/article/view.html.php:254
6	ContentViewArticle->display()	JROOT/libraries/src/MVC/Controller/BaseController.php:672
7	Joomla\CMS\MVC\Controller\BaseController->display()	JROOT/components/com_content/controller.php:118
8	ContentController->display()	JROOT/libraries/src/MVC/Controller/BaseController.php:710
9	Joomla\CMS\MVC\Controller\BaseController->execute()	JROOT/components/com_content/content.php:43
10	require_once()	JROOT/libraries/src/Component/ComponentHelper.php:402
11	Joomla\CMS\Component\ComponentHelper::executeComponent()	JROOT/libraries/src/Component/ComponentHelper.php:377
12	Joomla\CMS\Component\ComponentHelper::renderComponent()	JROOT/libraries/src/Application/SiteApplication.php:194
13	Joomla\CMS\Application\SiteApplication->dispatch()	JROOT/libraries/src/Application/SiteApplication.php:233
14	Joomla\CMS\Application\SiteApplication->doExecute()	JROOT/libraries/src/Application/CMSApplication.php:196
15	Joomla\CMS\Application\CMSApplication->execute()	JROOT/index.php:49

$tags = array();