Technical resource
Magento Checkout broken after SUPEE-10415, blank empty page
Historical Magento 1 troubleshooting reference for a blank checkout after SUPEE-10415 or earlier SUPEE-8788 changes.
Note: This is a historical reference, not a current security baseline. Magento 1 is end-of-life.
Problem description
After installing the SUPEE-10415 patch, the Magento checkout page may be broken, blank or empty.
Cause and solution
Several cases can be caused by an improper installation of SUPEE-10415 or the earlier SUPEE-8788 patch. Check these related references for possible solutions:
- Cannot redeclare Mage_Core_Helper_String::unserialize()
- Cannot redefine Mage_Customer_Model_Customer::MAXIMUM_PASSWORD_LENGTH
- Unsupported data type N in ArrValue.php:88
If you have difficulties solving this problem or found a similar case, see the historical comments below.
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