Ошибка 0 - Using $this when not in object context при обновлении PHP - Joomla 3.x: Установка, обновление и настройка

Using $this when not in object context

Call stack
#	Function	Location
1	()	JROOT/libraries/src/Application/CMSApplication.php:370
2	Joomla\CMS\Application\CMSApplication::getMenu()	JROOT/libraries/src/Application/SiteApplication.php:275
3	Joomla\CMS\Application\SiteApplication::getMenu()	JROOT/components/com_xmap/router.php:96
4	XmapBuildRoute()	JROOT/libraries/src/Component/Router/RouterLegacy.php:69
5	Joomla\CMS\Component\Router\RouterLegacy->build()	JROOT/libraries/src/Router/SiteRouter.php:528
6	Joomla\CMS\Router\SiteRouter->buildSefRoute()	JROOT/libraries/src/Router/SiteRouter.php:498
7	Joomla\CMS\Router\SiteRouter->_buildSefRoute()	JROOT/libraries/src/Router/Router.php:281
8	Joomla\CMS\Router\Router->build()	JROOT/libraries/src/Router/SiteRouter.php:154
9	Joomla\CMS\Router\SiteRouter->build()	JROOT/libraries/src/Router/Route.php:144
10	Joomla\CMS\Router\Route::link()	JROOT/libraries/src/Router/Route.php:93
11	Joomla\CMS\Router\Route::_()	JROOT/modules/mod_menu/helper.php:139
12	ModMenuHelper::getList()	JROOT/modules/mod_menu/mod_menu.php:15
13	include()	JROOT/plugins/system/t3/includes/joomla4/ModuleHelper.php:201
14	Joomla\CMS\Helper\ModuleHelper::renderModule()	JROOT/libraries/src/Document/Renderer/Html/ModuleRenderer.php:98
15	Joomla\CMS\Document\Renderer\Html\ModuleRenderer->render()	JROOT/libraries/src/Document/Renderer/Html/ModulesRenderer.php:47
16	Joomla\CMS\Document\Renderer\Html\ModulesRenderer->render()	JROOT/libraries/src/Document/HtmlDocument.php:491
17	Joomla\CMS\Document\HtmlDocument->getBuffer()	JROOT/libraries/src/Document/HtmlDocument.php:783
18	Joomla\CMS\Document\HtmlDocument->_renderTemplate()	JROOT/libraries/src/Document/HtmlDocument.php:557
19	Joomla\CMS\Document\HtmlDocument->render()	JROOT/libraries/src/Application/CMSApplication.php:1044
20	Joomla\CMS\Application\CMSApplication->render()	JROOT/libraries/src/Application/SiteApplication.php:778
21	Joomla\CMS\Application\SiteApplication->render()	JROOT/libraries/src/Application/CMSApplication.php:202
22	Joomla\CMS\Application\CMSApplication->execute()	JROOT/index.php:49

// no direct access
defined('_JEXEC') or die;

//check if t3 plugin is existed
if (!defined('T3')) {
    if (JError::$legacy) {
        JError::setErrorHandling(E_ERROR, 'die');
        JError::raiseError(500, JText::_('T3_MISSING_T3_PLUGIN'));
        exit;
    } else {
        throw new Exception(JText::_('T3_MISSING_T3_PLUGIN'), 500);
    }
}

[b]$t3app = T3::getApp($this);[/b]

// get configured layout
$layout = $t3app->getLayout();


$t3app->loadLayout($layout);

Joomla\CMS\Application\CMSApplication::getMenu() JROOT/libraries/src/Application/SiteApplication.php:275
Joomla\CMS\Application\SiteApplication::getMenu() JROOT/components/com_xmap/router.php:96

<?php
/**
 * @package     Joomla.Site
 * @subpackage  mod_menu
 *
 * [member=126442]copyright[/member]   Copyright (C) 2005 - 2019 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

defined('_JEXEC') or die;

// Include the menu functions only once
JLoader::register('ModMenuHelper', __DIR__ . '/helper.php');

$list       = ModMenuHelper::getList($params);
$base       = ModMenuHelper::getBase($params);
$active     = ModMenuHelper::getActive($params);
$default    = ModMenuHelper::getDefault();
$active_id  = $active->id;
$default_id = $default->id;
$path       = $base->tree;
$showAll    = $params->get('showAllChildren', 1);
$class_sfx  = htmlspecialchars($params->get('class_sfx'), ENT_COMPAT, 'UTF-8');

if (count($list))
{
	require JModuleHelper::getLayoutPath('mod_menu', $params->get('layout', 'default'));
}

	public static function getList(&$params)
	{
		$app = JFactory::getApplication();
		$menu = $app->getMenu();