Migrating and Upgrading to Joomla! 4.x • Error: "Call to undefined method Joomla\CMS\Application\AdministratorApplication::isAdmin()"

Hi everyone

I just upgraded from 3.10.x to 4.4.5 and ran into a big problem.

I know I'm not the first. I have already read several topics but in other cases it was clear that the problem was some incompatible extension.

In my case, I can't figure it out. It seems that the error is with joomla and not with extensions.
Can someone help me? I am grateful to you:


Call to undefined method Joomla\CMS\Application\AdministratorApplication::isAdmin()

Call stack
#FunctionLocation
1()JROOT/plugins/system/advga/advga.php:41
2plgSystemadvga->onAfterRender()JROOT/libraries/src/Plugin/CMSPlugin.php:289
3Joomla\CMS\Plugin\CMSPlugin->Joomla\CMS\Plugin\{closure}()JROOT/libraries/vendor/joomla/event/src/Dispatcher.php:486
4Joomla\Event\Dispatcher->dispatch()JROOT/libraries/src/Application/EventAware.php:111
5Joomla\CMS\Application\WebApplication->triggerEvent()JROOT/libraries/src/Application/CMSApplication.php:1031
6Joomla\CMS\Application\CMSApplication->render()JROOT/libraries/src/Application/AdministratorApplication.php:425
7Joomla\CMS\Application\AdministratorApplication->render()JROOT/libraries/src/Application/CMSApplication.php:298
8Joomla\CMS\Application\CMSApplication->execute()JROOT/administrator/includes/app.php:61
9require_once()JROOT/administrator/index.php:32

Thanks again

Statistics: Posted by gatesco — Thu Jun 27, 2024 6:32 pm

---