I have no idea what you do. It's weird that your code is in PHP, and the test results you shared were in Postman. And why sharing code in .png image?

Hi,

I'm calling the API through Postman but the backend is coded in php.

The site doesnt allow me to upload txt or php file that's why I upload image instead.

Can you tell me what's wrong?

I simply follow the codebase here:

https://github.com/ringcentral/ringcentral-php/blob/master/demo/fax.php

and here:

https://developers.ringcentral.com/guide/messaging/fax/sending-faxes


TLDR:
It works on local. Not working live with that error in the title.