Failed to execute 'postMessage' on 'DOMWindow': The target origin provided ('https://sandbox.eu.zuo

[ggovindaraju]

I am implementing the external submit button for our billing page to submit credit card details. I am following the instructions given in the these references.

Advanced Integration of Payment Pages 2.0

Configure Credit Card Type Payment Pages 2.0

After submission , I  am getting following error and same billing page is rendered inside the iframe.

zuora-min.js:27 Failed to execute 'postMessage' on 'DOMWindow': The target origin provided ('https://sandbox.eu.zuora.com') does not match the recipient window's origin 

I have the callback path setup in hosted pages as "/payment/response".

can anyone help on this?