Class 'Mage_Googlecheckout_Helper_Data' not found

Question

We\'ve just upgraded from Magento version 1.8.0.0 to 1.8.1.0 and now when we go to the configuration section of our site we receive the message:

Fatal error: Cla         


        

Answer 1

If you get this error it means you are on the right track.

Solution:

Close the Admin Panel browser window. As a user with root privileges, delete all files except config.xml from the following directory: magento-install-dir/app/code/core/Mage/GoogleCheckout/etc When you log back in to the Admin Panel, everything works as expected. If you're still encountering errors, see Getting Help With Your Installation or Upgrade.

The error you get was predicted and documented by the Magento core team. The solution I gave is from the Magento 1.8.1.0 release notes page