Recoverable Error: Object of class Varien_Object could not be converted to string  in /usr/share/nginx/html/app/code/local/Magestore/Affiliateplus/Helper/Data.php on line 167

#0 /usr/share/nginx/html/app/code/local/Magestore/Affiliateplus/Helper/Data.php(167): mageCoreErrorHandler(4096, 'Object of class...', '/usr/share/ngin...', 167, Array)
#1 /usr/share/nginx/html/app/code/local/Magestore/Affiliateplus/Model/Observer.php(1066): Magestore_Affiliateplus_Helper_Data->exitedCookie()
#2 /usr/share/nginx/html/app/code/local/Magestore/Affiliateplus/Model/Observer.php(118): Magestore_Affiliateplus_Model_Observer->saveClickAction(Object(Varien_Event_Observer))
#3 /usr/share/nginx/html/app/code/core/Mage/Core/Model/App.php(1338): Magestore_Affiliateplus_Model_Observer->controllerActionPredispatch(Object(Varien_Event_Observer))
#4 /usr/share/nginx/html/app/code/core/Mage/Core/Model/App.php(1317): Mage_Core_Model_App->_callObserverMethod(Object(Magestore_Affiliateplus_Model_Observer), 'controllerActio...', Object(Varien_Event_Observer))
#5 /usr/share/nginx/html/app/Mage.php(447): Mage_Core_Model_App->dispatchEvent('controller_acti...', Array)
#6 /usr/share/nginx/html/app/code/core/Mage/Core/Controller/Varien/Action.php(528): Mage::dispatchEvent('controller_acti...', Array)
#7 /usr/share/nginx/html/app/code/core/Mage/Core/Controller/Front/Action.php(64): Mage_Core_Controller_Varien_Action->preDispatch()
#8 /usr/share/nginx/html/app/code/core/Mage/Core/Controller/Varien/Action.php(408): Mage_Core_Controller_Front_Action->preDispatch()
#9 /usr/share/nginx/html/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(250): Mage_Core_Controller_Varien_Action->dispatch('noRoute')
#10 /usr/share/nginx/html/app/code/core/Mage/Core/Controller/Varien/Front.php(176): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#11 /usr/share/nginx/html/app/code/core/Mage/Core/Model/App.php(354): Mage_Core_Controller_Varien_Front->dispatch()
#12 /usr/share/nginx/html/app/Mage.php(683): Mage_Core_Model_App->run(Array)
#13 /usr/share/nginx/html/index.php(113): Mage::run('', 'store')
#14 {main}