Joomla - Application Instantiation Error

Håber nogen kan hjælpe mig.
Vores hjemmeside har været udsat for et hacker-angreb, men efter at have fjernet/repareret filer og opdateret Joomla manuelt melder den nu følgende fejl:
Call stack
#     Function     Location
1     ()     JROOT/libraries/src/Factory.php:137
2     Joomla\CMS\Factory::getApplication()     JROOT/libraries/src/Router/Route.php:50
3     Joomla\CMS\Router\Route::_()     JROOT/components/com_content/views/article/view.html.php:71
4     ContentViewArticle->display()     JROOT/libraries/legacy/controller/legacy.php:671
5     JControllerLegacy->display()     JROOT/components/com_content/controller.php:113
6     ContentController->display()     JROOT/libraries/legacy/controller/legacy.php:709
7     JControllerLegacy->execute()     JROOT/components/com_content/content.php:39
8     require_once()     JROOT/libraries/cms/component/helper.php:389
9     JComponentHelper::executeComponent()     JROOT/libraries/cms/component/helper.php:364
10     JComponentHelper::renderComponent()     JROOT/libraries/cms/application/site.php:191
11     JApplicationSite->dispatch()     JROOT/libraries/cms/application/site.php:230
12     JApplicationSite->doExecute()     JROOT/libraries/cms/application/cms.php:265
13     JApplicationCms->execute()     JROOT/index.php:55

Siger det nogen noget?