As soon I implement buttons or tabs I receive an error on the frontpage "Oops... Page Not Found!" https://flugplatz-schaenis.ch.185-117-170-102.srv06.webpreview.ch/ The site is in the developer mode.

Object of class stdClass could not be converted to string Call Stack

Function Location

1 () JROOT/templates/flex/sppagebuilder/addons/button_group/site.php:32 2 SppagebuilderAddonButton_group->render() JROOT/components/com_sppagebuilder/parser/addon-parser.php:977 3 AddonParser::getAddonHtmlView() JROOT/components/com_sppagebuilder/parser/addon-parser.php:456 4 AddonParser::viewAddons() JROOT/components/com_sppagebuilder/parser/addon-parser.php:438 5 AddonParser::viewAddons() JROOT/components/com_sppagebuilder/views/page/tmpl/default.php:92 6 include() JROOT/libraries/src/MVC/View/HtmlView.php:416 7 Joomla\CMS\MVC\View\HtmlView->loadTemplate() JROOT/libraries/src/MVC/View/HtmlView.php:204 8 Joomla\CMS\MVC\View\HtmlView->display() JROOT/components/com_sppagebuilder/views/page/view.html.php:74 9 SppagebuilderViewPage->display() JROOT/libraries/src/MVC/Controller/BaseController.php:697 10 Joomla\CMS\MVC\Controller\BaseController->display() JROOT/components/com_sppagebuilder/controller.php:81 11 SppagebuilderController->display() JROOT/libraries/src/MVC/Controller/BaseController.php:730 12 Joomla\CMS\MVC\Controller\BaseController->execute() JROOT/components/com_sppagebuilder/sppagebuilder.php:24 13 require_once() JROOT/libraries/src/Dispatcher/LegacyComponentDispatcher.php:71 14 Joomla\CMS\Dispatcher\LegacyComponentDispatcher::Joomla\CMS\Dispatcher{closure}() JROOT/libraries/src/Dispatcher/LegacyComponentDispatcher.php:73 15 Joomla\CMS\Dispatcher\LegacyComponentDispatcher->dispatch() JROOT/libraries/src/Component/ComponentHelper.php:361 16 Joomla\CMS\Component\ComponentHelper::renderComponent() JROOT/libraries/src/Application/SiteApplication.php:218 17 Joomla\CMS\Application\SiteApplication->dispatch() JROOT/libraries/src/Application/SiteApplication.php:261 18 Joomla\CMS\Application\SiteApplication->doExecute() JROOT/libraries/src/Application/CMSApplication.php:306 19 Joomla\CMS\Application\CMSApplication->execute() JROOT/includes/app.php:58 20 require_once() JROOT/index.php:32

sppagebuilder/addons/button_group/site.php:32