Symptoms:

  • Error message "invalid Ingenico request"
  • Stacktrace:
    #0 [...]/app/code/community/Netresearch/OPS/controllers/ApiController.php(63): Netresearch_OPS_Helper_DirectLink-> processFeedback(Object(Mage_Sales_Model_Order), Array)


Solution:

Please re-enter and save the SHA-IN and SHA-OUT configuration (hashes) in the Ingenico-backend and in Magento. The correct way to configure it is explained in detail in the documentation.