MAR
16
2018
Call to undefined method Mage_Log_Helper_Data::isLogFileExtensionValid() in app/Mage.php on line 811
Problem description The following error is shown or logged after Magento upgrade or patch installation (SUPEE-10415): PHP Fatal error: Call to undefined method Mage_Log_Helper_Data::isLogFileExtensionValid() in app/Mage.php on line 811 Cause app/Mage.php was updated with isLogFileExtensionValid() function, but there is no such function in app/code/core/Mage/Log/Helper/Data.php or code is cached by Magento Compiler or Opcode Cache. Ensure that the following code is in app/code/core/Mage/Log/Helper/Data.php (at the very end of file) If the code above is there, proceed… Read the rest