Call to undefined method Joomla\CMS\Application\AdministratorApplication::isSite() Topic is solved

[netx84]

Hello everyone,
after upgrading from joomla 3.10.2 to 4.0.3, I have some errors that are preventing me from accessing the backend of the site. The website is also not working This is a very important issue for me because if it fails to migrate the site I will have to make it from scratch.

Please help me

Call stack
# Function Location
1 () JROOT\plugins\system\cwtrafficclean\cwtrafficclean.php:112
2 plgSystemCwtrafficClean->onAfterRoute() JROOT\libraries\src\Plugin\CMSPlugin.php:285
3 Joomla\CMS\Plugin\CMSPlugin->Joomla\CMS\Plugin\{closure}() JROOT\libraries\vendor\joomla\event\src\Dispatcher.php:486
4 Joomla\Event\Dispatcher->dispatch() JROOT\libraries\src\Application\EventAware.php:111
5 Joomla\CMS\Application\WebApplication->triggerEvent() JROOT\libraries\src\Application\AdministratorApplication.php:547
6 Joomla\CMS\Application\AdministratorApplication->route() JROOT\libraries\src\Application\AdministratorApplication.php:171
7 Joomla\CMS\Application\AdministratorApplication->doExecute() JROOT\libraries\src\Application\CMSApplication.php:278
8 Joomla\CMS\Application\CMSApplication->execute() JROOT\administrator\includes\app.php:63
9 require_once() JROOT\administrator\index.php:32

[sozzled]

See viewtopic.php?f=812&t=988201

[netx84]

Sozzed
you are great
I uninstalled the add-ons and the update succeeded

Thank you very, very much

Greetings
Michael

[brian]

Please note that the offending plugin was identified before you did the upgrade and you were advised to disable it