Lack of admin privilege when I tried to create a new zone or any action by using API

[tien_phan_anotw]

Hello Everyone,

I am trying to create some items in virtual SmartZone E by using API on Swagger Inspector API tool. I can do something with API, but also could not do something with API. 

It returns this one: 

{
    "message": "Permission denied (Access is denied)",
    "errorCode": 211,
    "errorType": "Lack of admin privilege"
}

example API calling
https://1.1.1.1:8443/wsg/api/public/v8_1/rkszones/domainId

my vSZ-E version is 5.1.1.0.598.

I already inputed the creadential information with Basic Authentication tab, then input Username and Password. 


My question is why did it appear? My account is Super Administrator and I already logged in to vSZ-E on web browser, also input the vSZ-E's credential. 

Thank you.