Editing any CMS page in Magento 1.7.0.2 results in a blank page or the following fatal error is shown after hitting Save button at CMS > Pages > Home or any other CMS page:
Fatal error: Cannot redeclare Mage_Adminhtml_Model_LayoutUpdate_Validator::$_validator in app/code/core/Mage/Adminhtml/Model/LayoutUpdate/Validator.php on line 80
It simply does not allow to edit any CMS page with custom XML layouts.
Cause
The was a bug in previous version of SUPEE-11219 where$_validator was defined twice.
Solution
Rollback previous version of SUPEE-11219 and install the latest one (v13 at the moment):$ bash ./PATCH_SUPEE-11219_CE_1.7.0.2_v9.sh --revert Checking if patch can be applied/reverted successfully... Patch was applied/reverted successfully. $ bash ./PATCH_SUPEE-11219_CE_1.7.0.2_v13.sh Checking if patch can be applied/reverted successfully... Patch was applied/reverted successfully.
Posted in: Fatal errors, Known issues, supee-11219