Cannot log in backend

[kasemalta]

Hi today i was adding some products to my store and all of sudden after uploading a picture the backend got stuck. I tried to log in again but it throw following errors. Any idea how can I fix this? Any idea is appreciate. Thanks to all

Trace:
#0 /data/web/virtuals/79591/virtual/www/app/code/community/CommerceStack/Recommender/Model/AdminNotification/Feed.php(32): CommerceStack_Recommender_Helper_Data->reportException(Object(Pest_UnknownResponse))
#1 /data/web/virtuals/79591/virtual/www/app/code/core/Mage/AdminNotification/Model/Feed.php(83): CommerceStack_Recommender_Model_AdminNotification_Feed->getFeedData()
#2 /data/web/virtuals/79591/virtual/www/app/code/core/Mage/AdminNotification/Model/Observer.php(50): Mage_AdminNotification_Model_Feed->checkUpdate()
#3 /data/web/virtuals/79591/virtual/www/app/code/core/Mage/Core/Model/App.php(1299): Mage_AdminNotification_Model_Observer->preDispatch(Object(Varien_Event_Observer))
#4 /data/web/virtuals/79591/virtual/www/app/code/core/Mage/Core/Model/App.php(1280): Mage_Core_Model_App->_callObserverMethod(Object(Mage_AdminNotification_Model_Observer), 'preDispatch', Object(Varien_Event_Observer))
#5 /data/web/virtuals/79591/virtual/www/app/Mage.php(416): Mage_Core_Model_App->dispatchEvent('controller_acti...', Array)
#6 /data/web/virtuals/79591/virtual/www/app/code/core/Mage/Core/Controller/Varien/Action.php(505): Mage::dispatchEvent('controller_acti...', Array)
#7 /data/web/virtuals/79591/virtual/www/app/code/core/Mage/Adminhtml/Controller/Action.php(152): Mage_Core_Controller_Varien_Action->preDispatch()
#8 /data/web/virtuals/79591/virtual/www/app/code/core/Mage/Core/Controller/Varien/Action.php(409): Mage_Adminhtml_Controller_Action->preDispatch()
#9 /data/web/virtuals/79591/virtual/www/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(250): Mage_Core_Controller_Varien_Action->dispatch('index')
#10 /data/web/virtuals/79591/virtual/www/app/code/core/Mage/Core/Controller/Varien/Front.php(176): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#11 /data/web/virtuals/79591/virtual/www/app/code/core/Mage/Core/Model/App.php(347): Mage_Core_Controller_Varien_Front->dispatch()
#12 /data/web/virtuals/79591/virtual/www/app/Mage.php(640): Mage_Core_Model_App->run(Array)
#13 /data/web/virtuals/79591/virtual/www/index.php(80): Mage::run('', 'store')
#14 {main}

[Amjath]

Can you please try by disabling the module CommerceStack / Recommender?

Thanks

Amjath

[yasarA]

/app/code/core/Mage/Core/Model/Session/Abstract/Varien.php

$cookieParams = array(
'lifetime' => $cookie->getLifetime(),
'path' => $cookie->getPath(),
'domain' => $cookie->getConfigDomain(),
'secure' => $cookie->isSecure(),
'httponly' => $cookie->getHttponly()

Hide above line,Incase it did not working Go to magneto downloader and reinstall the you newly install extension

[Hadifarnoud]

why are these topics in Show Your Site forum?

[RonaldLKouba]

Try to disable that CommerceStack module by going into your app/etc/modules/ folder. Find the extension and add -- in the file, so Magento can't recognize it anymore. It should now be disabled.

Head over to the var/ folder and delete the cache folder inside it. You should now be able to login to your admin panel again.