Hello

We have this webpage for 1 year and has worked without any problems. For two weeks, when I create an Event with LMS Events the page doesn't work anymore and this message appears:

"Using $this when not in object context"

We use Joomla 3.10.8
Template Language School
Every extensions are up to day
https://www.metrobasel.org/ch/

This information from debug system:

Call stack

Function Location

1 () JROOT/templates/shaper_languageschool/html/mod_splmsupcomingevents/default.php:48
2 require() JROOT/modules/mod_splmsupcomingevents/mod_splmsupcomingevents.php:34
3 include() JROOT/libraries/src/Helper/ModuleHelper.php:200
4 Joomla\CMS\Helper\ModuleHelper::renderModule() JROOT/components/com_sppagebuilder/addons/module/site.php:51
5 SppagebuilderAddonModule->render() JROOT/components/com_sppagebuilder/parser/addon-parser.php:551
6 AddonParser::getAddonHtmlView() JROOT/components/com_sppagebuilder/parser/addon-parser.php:366
7 AddonParser::viewAddons() JROOT/components/com_sppagebuilder/views/page/tmpl/default.php:95
8 include() JROOT/libraries/src/MVC/View/HtmlView.php:701
9 Joomla\CMS\MVC\View\HtmlView->loadTemplate() JROOT/libraries/src/MVC/View/HtmlView.php:230
10 Joomla\CMS\MVC\View\HtmlView->display() JROOT/components/com_sppagebuilder/views/page/view.html.php:47
11 SppagebuilderViewPage->display() JROOT/libraries/src/MVC/Controller/BaseController.php:664
12 Joomla\CMS\MVC\Controller\BaseController->display() JROOT/components/com_sppagebuilder/controller.php:81
13 SppagebuilderController->display() JROOT/libraries/src/MVC/Controller/BaseController.php:702
14 Joomla\CMS\MVC\Controller\BaseController->execute() JROOT/components/com_sppagebuilder/sppagebuilder.php:24
15 require_once() JROOT/libraries/src/Component/ComponentHelper.php:402
16 Joomla\CMS\Component\ComponentHelper::executeComponent() JROOT/libraries/src/Component/ComponentHelper.php:377
17 Joomla\CMS\Component\ComponentHelper::renderComponent() JROOT/libraries/src/Application/SiteApplication.php:194
18 Joomla\CMS\Application\SiteApplication->dispatch() JROOT/libraries/src/Application/SiteApplication.php:233
19 Joomla\CMS\Application\SiteApplication->doExecute() JROOT/libraries/src/Application/CMSApplication.php:225
20 Joomla\CMS\Application\CMSApplication->execute() JROOT/index.php:49

Can you help me?

Thanks