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Checkout page white screen

hellen2012 Total Posts: 2 Joined: 2012-05-21 Ignore user	My site using OneStepCheckout, when i go to checkout page, it is white screen, and i need to refresh it at first time. i check the error log in var/log exception.log, there are three errors: 2012-05-22T02:03:08+00:00 ERR (3): exception 'Mage_Core_Exception' with message 'Invalid block type: Mage_Googleoptimizer_Block_Code_Conversion' in /root/mysite/files/app/Mage.php:563 Stack trace: #0 /root/mysite/files/app/code/core/Mage/Core/Model/Layout.php(469): Mage::throwException('Invalid block t...') #1 /root/mysite/files/app/code/core/Mage/Core/Model/Layout.php(411): Mage_Core_Model_Layout->_getBlockInstance('googleoptimizer...', Array) #2 /root/mysite/files/app/code/core/Mage/Core/Model/Layout.php(446): Mage_Core_Model_Layout->createBlock('googleoptimizer...', 'googleoptimizer...') #3 /root/mysite/files/app/code/core/Mage/Core/Model/Layout.php(238): Mage_Core_Model_Layout->addBlock('googleoptimizer...', 'googleoptimizer...') #4 /root/mysite/files/app/code/core/Mage/Core/Model/Layout.php(204): Mage_Core_Model_Layout->_generateBlock(Object(Mage_Core_Model_Layout_Element), Object(Mage_Core_Model_Layout_Element)) #5 /root/mysite/files/app/code/core/Mage/Core/Model/Layout.php(209): Mage_Core_Model_Layout->generateBlocks(Object(Mage_Core_Model_Layout_Element)) #6 /root/mysite/files/app/code/core/Mage/Core/Controller/Varien/Action.php(345): Mage_Core_Model_Layout->generateBlocks() #7 /root/mysite/files/app/code/core/Mage/Core/Controller/Varien/Action.php(270): Mage_Core_Controller_Varien_Action->generateLayoutBlocks() #8 /root/mysite/files/app/code/local/Idev/OneStepCheckout/controllers/IndexController.php(25): Mage_Core_Controller_Varien_Action->loadLayout() #9 /root/mysite/files/app/code/core/Mage/Core/Controller/Varien/Action.php(420): Idev_OneStepCheckout_IndexController->indexAction() #10 /root/mysite/files/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(250): Mage_Core_Controller_Varien_Action->dispatch('index') #11 /root/mysite/files/app/code/core/Mage/Core/Controller/Varien/Front.php(176): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http)) #12 /root/mysite/files/app/code/core/Mage/Core/Model/App.php(349): Mage_Core_Controller_Varien_Front->dispatch() #13 /root/mysite/files/app/Mage.php(640): Mage_Core_Model_App->run(Array) #14 /root/mysite/files/index.php(80): Mage::run('', 'store') #15 {main} 2012-05-22T02:03:08+00:00 ERR (3): exception 'Mage_Core_Exception' with message 'Invalid block type: Mage_Enterprise_Customerbalance_Block_Checkout_Onepage_Payment_Additional' in /root/mysite/files/app/Mage.php:563 Stack trace: #0 /root/mysite/files/app/code/core/Mage/Core/Model/Layout.php(469): Mage::throwException('Invalid block t...') #1 /root/mysite/files/app/code/core/Mage/Core/Model/Layout.php(411): Mage_Core_Model_Layout->_getBlockInstance('enterprise_cust...', Array) #2 /root/mysite/files/app/code/local/Idev/OneStepCheckout/controllers/IndexController.php(29): Mage_Core_Model_Layout->createBlock('enterprise_cust...', 'customerbalance', Array) #3 /root/mysite/files/app/code/core/Mage/Core/Controller/Varien/Action.php(420): Idev_OneStepCheckout_IndexController->indexAction() #4 /root/mysite/files/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(250): Mage_Core_Controller_Varien_Action->dispatch('index') #5 /root/mysite/files/app/code/core/Mage/Core/Controller/Varien/Front.php(176): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http)) #6 /root/mysite/files/app/code/core/Mage/Core/Model/App.php(349): Mage_Core_Controller_Varien_Front->dispatch() #7 /root/mysite/files/app/Mage.php(640): Mage_Core_Model_App->run(Array) #8 /root/mysite/files/index.php(80): Mage::run('', 'store') #9 {main} 2012-05-22T02:03:08+00:00 ERR (3): exception 'Mage_Core_Exception' with message 'Invalid block type: Mage_Enterprise_Reward_Block_Checkout_Payment_Additional' in /root/mysite/files/app/Mage.php:563 Stack trace: #0 /root/mysite/files/app/code/core/Mage/Core/Model/Layout.php(469): Mage::throwException('Invalid block t...') #1 /root/mysite/files/app/code/core/Mage/Core/Model/Layout.php(411): Mage_Core_Model_Layout->_getBlockInstance('enterprise_rewa...', Array) #2 /root/mysite/files/app/code/local/Idev/OneStepCheckout/controllers/IndexController.php(32): Mage_Core_Model_Layout->createBlock('enterprise_rewa...', 'reward.points', Array) #3 /root/mysite/files/app/code/core/Mage/Core/Controller/Varien/Action.php(420): Idev_OneStepCheckout_IndexController->indexAction() #4 /root/mysite/files/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(250): Mage_Core_Controller_Varien_Action->dispatch('index') #5 /root/mysite/files/app/code/core/Mage/Core/Controller/Varien/Front.php(176): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http)) #6 /root/mysite/files/app/code/core/Mage/Core/Model/App.php(349): Mage_Core_Controller_Varien_Front->dispatch() #7 /root/mysite/files/app/Mage.php(640): Mage_Core_Model_App->run(Array) #8 /root/mysite/files/index.php(80): Mage::run('', 'store') #9 {main} I try to deleted var/session and var/cache, but it cant help me. How can i fix it?
	Posted: May 22 2012 \| top

flakerimi Total Posts: 1 Joined: 2011-12-24 Ignore user	I have same issue. Please post if you fix it. Mage_Googleoptimizer_Block_Code_Conversion Is my error.
	Posted: May 22 2012 \| top \| # 1

hellen2012 Total Posts: 2 Joined: 2012-05-21 Ignore user	flakerimi - 22 May 2012 06:11 AM I have same issue. Please post if you fix it. Mage_Googleoptimizer_Block_Code_Conversion Is my error. OK, i fixed it, you need to install a plugin ‘Googleoptimizer’ , this you can find it in ‘Magento connect’. Just install, no need it to work, and this error will gone. You can check my site: http://www.tablet-hub.com it work fine.
	Posted: June 14 2012 \| top \| # 2

JerVoo Total Posts: 2 Joined: 2010-09-02 Ignore user	Or you could have just commented out the part where the block gets loaded in onestepcheckout’s layout xml. app/design/frontend/base/default/layout/onestepcheckout.xml around line 72: `<block type="googleoptimizer/code_conversion" after="-" name="googleoptimizer.conversion.script"> <action method="setScriptType"><scriptType>conversion_script</scriptType></action> <action method="setPageType"><pageType>checkout_onepage_success</pageType></action> </block>` Just comment that part out and clean your cache.
	Posted: August 9 2012 \| top \| # 3

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how to solve it : Mage registry key "_resource_helper/core" already exists