Fatal error: Uncaught Error: Call to a member function set() on null in /home/chicmar3/public_html/app/code/core/Mage/Core/Model/Session/Abstract/Varien.php:160 Stack trace: #0 /home/chicmar3/public_html/app/code/core/Mage/Core/Model/Session/Abstract/Varien.php(228): Mage_Core_Model_Session_Abstract_Varien->start(NULL) #1 /home/chicmar3/public_html/app/code/core/Mage/Core/Model/Session/Abstract.php(84): Mage_Core_Model_Session_Abstract_Varien->init('core', NULL) #2 /home/chicmar3/public_html/app/code/core/Mage/Core/Model/Session.php(42): Mage_Core_Model_Session_Abstract->init('core', NULL) #3 /home/chicmar3/public_html/app/code/core/Mage/Core/Model/Config.php(1348): Mage_Core_Model_Session->__construct(Array) #4 /home/chicmar3/public_html/app/Mage.php(463): Mage_Core_Model_Config->getModelInstance('core/session', Array) #5 /home/chicmar3/public_html/app/Mage.php(477): Mage::getModel('core/session', Array) #6 /home/chicmar3/public_html/app/code/local/Chic/Referral/Helper/Data.php(9): Mage::getSingleton('core/session') #7 / in /home/chicmar3/public_html/app/code/core/Mage/Core/Model/Session/Abstract/Varien.php on line 160