Unable to read response, or response is empty

#0 /var/www/magento/lib/Redarea/Utility/JsonRpcClient.php(70): Zend_Http_Client->request()
#1 /var/www/magento/lib/Redarea/Auth/Adapter/Guest.php(43): Redarea_Utility_JsonRpcClient->sendRequest('Account.insertG...', Array)
#2 /var/www/magento/lib/Redarea/Auth.php(36): Redarea_Auth_Adapter_Guest->authenticate()
#3 /var/www/magento/app/code/local/Rikorda/Core/Model/Session.php(165): Redarea_Auth->authenticate(Object(Redarea_Auth_Adapter_Guest))
#4 /var/www/magento/app/code/core/Mage/Core/Model/Session/Abstract/Varien.php(169): Rikorda_Core_Model_Session->start('PHPSESSID')
#5 /var/www/magento/app/code/core/Mage/Core/Model/Session/Abstract.php(84): Mage_Core_Model_Session_Abstract_Varien->init('core', 'PHPSESSID')
#6 /var/www/magento/app/code/core/Mage/Core/Model/Session.php(42): Mage_Core_Model_Session_Abstract->init('core', 'PHPSESSID')
#7 /var/www/magento/app/code/core/Mage/Core/Model/Config.php(1348): Mage_Core_Model_Session->__construct(Array)
#8 /var/www/magento/app/Mage.php(463): Mage_Core_Model_Config->getModelInstance('core/session', Array)
#9 /var/www/magento/app/Mage.php(477): Mage::getModel('core/session', Array)
#10 /var/www/magento/app/code/core/Mage/Core/Controller/Varien/Action.php(493): Mage::getSingleton('core/session', Array)
#11 /var/www/magento/app/code/core/Mage/Core/Controller/Front/Action.php(64): Mage_Core_Controller_Varien_Action->preDispatch()
#12 /var/www/magento/app/code/core/Mage/Core/Controller/Varien/Action.php(407): Mage_Core_Controller_Front_Action->preDispatch()
#13 /var/www/magento/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(250): Mage_Core_Controller_Varien_Action->dispatch('view')
#14 /var/www/magento/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#15 /var/www/magento/app/code/core/Mage/Core/Model/App.php(354): Mage_Core_Controller_Varien_Front->dispatch()
#16 /var/www/magento/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#17 /var/www/magento/index.php(183): Mage::run('photorec', 'store')
#18 {main}