InControl API - cmd.sms.sendMessage Unsupported Request

Hi,

My frimware is up to date (8.3.0) but when trying this command:

api/cmd.sms.sendMessage

I get:

{
“stat”: “fail”,
“code”: 404,
“message”: “Unsupported request”
}

All other APIs I’ve used work perfectly, it’s just this one and I really need to be able to use it.

I have a Max Transit Duo

Firmware 8.3.0 build 5229
Peplink MAX Transit Pro