Errors after upgrade from 3.10 to 4.4.6
I have multiple errors after upgrade.
After disabling most plugins, extensions, after installing new versions, I still have problems with the site. No matter what version of php I use, 7.4, 8.0 or 8.1, the errors persist. For example, I can no longer add new posts in jomsocial, I receive errors such as "0 The file jaupdater.jat3.xml could not be found."

Call stack

Function Location

1 () JROOT/administrator/components/com_plugins/src/Model/PluginModel.php:279
2 Joomla\Component\Plugins\Administrator\Model\PluginModel->preprocessForm() JROOT/libraries/src/MVC/Model/FormBehaviorTrait.php:107
3 Joomla\CMS\MVC\Model\FormModel->loadForm() JROOT/administrator/components/com_plugins/src/Model/PluginModel.php:109
4 Joomla\Component\Plugins\Administrator\Model\PluginModel->getForm() JROOT/libraries/src/MVC/View/AbstractView.php:152
5 Joomla\CMS\MVC\View\AbstractView->get() JROOT/administrator/components/com_plugins/src/View/Plugin/HtmlView.php:65
6 Joomla\Component\Plugins\Administrator\View\Plugin\HtmlView->display() JROOT/libraries/src/MVC/Controller/BaseController.php:660
7 Joomla\CMS\MVC\Controller\BaseController->display() JROOT/administrator/components/com_plugins/src/Controller/DisplayController.php:64
8 Joomla\Component\Plugins\Administrator\Controller\DisplayController->display() JROOT/libraries/src/MVC/Controller/BaseController.php:693
9 Joomla\CMS\MVC\Controller\BaseController->execute() JROOT/libraries/src/Dispatcher/ComponentDispatcher.php:143
10 Joomla\CMS\Dispatcher\ComponentDispatcher->dispatch() JROOT/libraries/src/Component/ComponentHelper.php:361
11 Joomla\CMS\Component\ComponentHelper::renderComponent() JROOT/libraries/src/Application/AdministratorApplication.php:143
12 Joomla\CMS\Application\AdministratorApplication->dispatch() JROOT/libraries/src/Application/AdministratorApplication.php:186
13 Joomla\CMS\Application\AdministratorApplication->doExecute() JROOT/libraries/src/Application/CMSApplication.php:293
14 Joomla\CMS\Application\CMSApplication->execute() JROOT/administrator/includes/app.php:61
15 require_once() JROOT/administrator/index.php:32

If I want to add a blog entry I have this error: 500
behavior::modal not found.