Hello all,

I have upgraded my Joomla 3 site to Joomla 4 on a dedicated offline server. I have enabled T4 Template Blank as the default for all pages. Unfortunately, the homepage shows a behavior::caption not found.

Also, I enabled Log Almost Everything in Global Configuration -> Logging.

The file everything.php shows the following:

2021-11-30T11:57:17+00:00	CRITICAL 192.168.33.1	error	Uncaught Throwable of type InvalidArgumentException thrown with message "behavior::caption not found.". Stack trace: #0 /var/www/html/joomla/templates/t4_blank/html/com_content/featured/default.php(14): Joomla\CMS\HTML\HTMLHelper::_()
#1 /var/www/html/joomla/plugins/system/t4/src/t4/Helper/Joomla.php(12) : eval()'d code(429): include('/var/www/html/j...')
#2 /var/www/html/joomla/plugins/system/t4/src/joomla/src/MVC/View/HtmlView.php(54): Joomla\CMS\MVC\View\_JHtmlView->loadTemplate()
#3 /var/www/html/joomla/plugins/system/t4/src/t4/Helper/Joomla.php(12) : eval()'d code(218): Joomla\CMS\MVC\View\HtmlView->loadTemplate()
#4 /var/www/html/joomla/components/com_content/src/View/Featured/HtmlView.php(208): Joomla\CMS\MVC\View\_JHtmlView->display()
#5 /var/www/html/joomla/libraries/src/Cache/Controller/ViewController.php(102): Joomla\Component\Content\Site\View\Featured\HtmlView->display()
#6 /var/www/html/joomla/libraries/src/MVC/Controller/BaseController.php(683): Joomla\CMS\Cache\Controller\ViewController->get()
#7 /var/www/html/joomla/components/com_content/src/Controller/DisplayController.php(125): Joomla\CMS\MVC\Controller\BaseController->display()
#8 /var/www/html/joomla/libraries/src/MVC/Controller/BaseController.php(730): Joomla\Component\Content\Site\Controller\DisplayController->display()
#9 /var/www/html/joomla/libraries/src/Dispatcher/ComponentDispatcher.php(146): Joomla\CMS\MVC\Controller\BaseController->execute()
#10 /var/www/html/joomla/components/com_content/src/Dispatcher/Dispatcher.php(55): Joomla\CMS\Dispatcher\ComponentDispatcher->dispatch()
#11 /var/www/html/joomla/libraries/src/Component/ComponentHelper.php(389): Joomla\Component\Content\Site\Dispatcher\Dispatcher->dispatch()
#12 /var/www/html/joomla/libraries/src/Application/SiteApplication.php(206): Joomla\CMS\Component\ComponentHelper::renderComponent()
#13 /var/www/html/joomla/libraries/src/Application/SiteApplication.php(245): Joomla\CMS\Application\SiteApplication->dispatch()
#14 /var/www/html/joomla/libraries/src/Application/CMSApplication.php(278): Joomla\CMS\Application\SiteApplication->doExecute()
#15 /var/www/html/joomla/includes/app.php(63): Joomla\CMS\Application\CMSApplication->execute()
#16 /var/www/html/joomla/index.php(32): require_once('/var/www/html/j...')
#17 {main}

I have feeling that the upgrade from T3 to J4 breaks T4 Framework. Reinstalling the T4 Framework installation files did not solve this issue.

Any suggestions?

With kind regards,
TheStingPilot