Serialization of 'Mage_Core_Model_Config_Element' is not allowed

#0 /var/www/ppirkti_lt/public_html/app/code/local/Codemakers/OfferSlider/Block/Offerslider/View.php(71): serialize(Object(Codemakers_OfferSlider_Model_Resource_Offerslider_Product_Collection))
#1 /var/www/ppirkti_lt/public_html/app/design/frontend/pp/default/template/codemakers/homeoffer/slider.phtml(2): Codemakers_OfferSlider_Block_Offerslider_View->getLoadedProductCollection()
#2 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Block/Template.php(241): include('/var/www/ppirkt...')
#3 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('frontend/pp/def...')
#4 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView()
#5 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Block/Abstract.php(923): Mage_Core_Block_Template->_toHtml()
#6 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Block/Abstract.php(641): Mage_Core_Block_Abstract->toHtml()
#7 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Block/Abstract.php(581): Mage_Core_Block_Abstract->_getChildHtml('homeoffer_17', true)
#8 /var/www/ppirkti_lt/public_html/app/design/frontend/pp/default/template/codemakers/homeoffer/place.phtml(1): Mage_Core_Block_Abstract->getChildHtml()
#9 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Block/Template.php(241): include('/var/www/ppirkt...')
#10 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('frontend/pp/def...')
#11 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView()
#12 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Block/Abstract.php(923): Mage_Core_Block_Template->_toHtml()
#13 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Block/Text/List.php(43): Mage_Core_Block_Abstract->toHtml()
#14 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Block/Abstract.php(923): Mage_Core_Block_Text_List->_toHtml()
#15 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Block/Abstract.php(641): Mage_Core_Block_Abstract->toHtml()
#16 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Block/Abstract.php(585): Mage_Core_Block_Abstract->_getChildHtml('content', true)
#17 /var/www/ppirkti_lt/public_html/app/design/frontend/pp/default/template/page/home.phtml(67): Mage_Core_Block_Abstract->getChildHtml('content')
#18 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Block/Template.php(241): include('/var/www/ppirkt...')
#19 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('frontend/pp/def...')
#20 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView()
#21 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Block/Abstract.php(923): Mage_Core_Block_Template->_toHtml()
#22 /var/www/ppirkti_lt/public_html/app/code/community/MageMechanic/PhpSeven/Model/Layout.php(32): Mage_Core_Block_Abstract->toHtml()
#23 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Controller/Varien/Action.php(391): MageMechanic_PhpSeven_Model_Layout->getOutput()
#24 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Cms/Helper/Page.php(137): Mage_Core_Controller_Varien_Action->renderLayout()
#25 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Cms/Helper/Page.php(52): Mage_Cms_Helper_Page->_renderPage(Object(Mage_Cms_IndexController), 'home')
#26 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Cms/controllers/IndexController.php(45): Mage_Cms_Helper_Page->renderPage(Object(Mage_Cms_IndexController), 'home')
#27 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Controller/Varien/Action.php(419): Mage_Cms_IndexController->indexAction()
#28 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(254): Mage_Core_Controller_Varien_Action->dispatch('index')
#29 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#30 /var/www/ppirkti_lt/public_html/app/code/core/Mage/Core/Model/App.php(365): Mage_Core_Controller_Varien_Front->dispatch()
#31 /var/www/ppirkti_lt/public_html/app/Mage.php(685): Mage_Core_Model_App->run(Array)
#32 /var/www/ppirkti_lt/public_html/index.php(96): Mage::run('', 'store')
#33 {main}