If the Response Encryption Key ID and Response Decryption Private Key fields are disabled even after updating the Configuration settings, it is likely that one of the following applies:
Message Level Encryption (MLE) has not been fully enabled for your merchant/profile.
The required encryption certificates or key pairs have not been uploaded or activated.
Your user role lacks the permissions needed to modify MLE settings.
The environment (test vs. production) has restrictions that require configuration by the Smartpay Fuse support team.
A few things to verify:
Confirm that the response encryption certificate and corresponding private key have been successfully uploaded.
Check whether MLE is enabled at the account or organization level.
Verify that you are using an account with administrative privileges.
Try refreshing or reopening the configuration page after saving any certificate changes.
If all of the above are already in place, I would recommend opening a support ticket with Smartpay Fuse and providing:
Your merchant/account ID.
Environment (test or production).
Screenshots showing the disabled fields.
Confirmation that the certificates and keys have been configured.
The fact that the fields remain disabled suggests this may be an account-level configuration issue rather than a problem with the API endpoint itself.
