I am using sandbox account and mode is set to live for account. I am using accept hosted payment form, implemented form using iframe as per given examples from Authorize.net accept hosted example web page. Code was working smoothly till yesterday  suddenly from today morning token is not getting generated for accept hosted payment form. 

It is giving error E00013:Invalid Setting Value. hostedPaymentIFrameCommunicatorUrlurl: must begin with https://.

Below given is screenshot how i am passing setting value to generate token  

For hostedPaymentIFrameCommunicatorUrl settings i am also using same url in api call for accept hosted customer profile save page, there token is generated properly and showing UI in iframe.
Only accept hosted payment is broken.

Please help me with this issue urgently.