Captcha not loading

Captcha image is not loading - just shows the spinning arrow.

I've tested this with three different browsers -- clearing the cache in each one.

The same problem occurs in the "Preview Form" function in the Jotform control panel / form builder.

Please investigate & advise.

Thanks

This seems like a duplicated thread, we have already answered to you here: https://www.jotform.com/answers/1528685 

Thanks.