Application Instantiation Error

[Mareia+]

Our page has been hacked, but after removing/restoring files and manually updating Joomla I get this error-report:

(Jeg er ny her, så ved ikke om jeg skal skrive på dansk eller engelsk)

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

Any suggestions? Please?

[Mareia+]

I have manually installed a previous version (3.4), but now it says:

Fatal error: Call to undefined method JApplicationAdministrator::isClient() in /customers/f/b/a/duusgaard.dk/httpd.www/plugins/system/stats/stats.php on line 82

[kitepascal]

Hi Mareia,

from when did you restore the backup?
It may be, that the hack happened many months ago.

It's not a good idea to update from 3.4 to 3.8 by just replacing the files. The 'automatic' way via the update coponent is a lot easier (3.4.8 -> 3.6.5 > 3.8.6).


If you have a 3.4/3.8 mix now a few hints for doing it manually:
Try to rename the /libraries folder and upload it in original state of the target version (3.8.6).
If the backend is running again hit the 'repair database' button to get your database updated and to remove some files from previous versions (causing problems).

In case of other errors you could try the direkt link for that action:
exampla.org/administrator/index.php?option=com_installer&task=database.fix

After that you still have to install the new core components/plugins via Extensions -> Discover. https://docs.joomla.org/Help38:Extensio ... r_Discover

[abernyte]

If you have been hacked then the only safe route back is via these instructions: viewtopic.php?f=714&t=946026 follow the link at the end for the full set. Replacing files manually at random risks leaving the hack in place.