Issue Getting This Error when making an API call for backups

[WordPressChamp]

I am getting this error while making API call for taking backup of a subscription.
All other API call are working fine for me. Let me know why this error is coming as response and any suggestions to fix it.
I am using PHP and curl for making API calls.

 

[sebgonzes]

I am getting this error while making API call for taking backup of a subscription.
All other API call are working fine for me. Let me know why this error is coming as response and any suggestions to fix it.
I am using PHP and curl for making API calls.

Check is really what you request is still available... Plesk doc API are not always updated, I have the same case with spam element that was disable. You can review this : http://plesk.github.io/api-schemas/latest/agent_input.svg but in anycase, the better way is to contact plesk extension team to have confirmation.