Error: invalid json response body at https://... reason: Unexpected end of JSON input

Hello everyone,

Im trying to do a getStatus tracking function…i follow guide at HERE
And I was check API in “postman” and i got result a pic below


But when I run the code it gives me an error in the console that says: invalid json response body at https://services.giaohangtietkiem.vn/services/shipment/v2/363432680 reason: Unexpected end of JSON input
I guess, if use method GET then don’t need “body”. Something wrong?
Can someone please help me?

p/s: Sorry, because my English so bad.

My code in Backend:
import {fetch} from “wix-fetch”

export function getStatus(bill) {
const url = ‘https://services.giaohangtietkiem.vn/services/shipment/v2/’ + bill ;
console.log( "Url: " + url);

return fetch(url, {
“method” : ‘get’ ,
“Header” : {
“Token” : “XXXXXXXXXXXXXXXXXX” ,
}
})
.then(response => response.json())
}

My Code in Page:
import {getStatus} from ‘backend/getStatus’ ;

export function Get_click(event, $w) {
$w( ‘#result’ ).show();
getStatus($w( “#bill” ).value)
.then(traceInfo => {
$w( ‘#result’ ).text = “Thông tin Vận Đơn” + traceInfo[ 0 ].label_id + “\n”
+ “Người Nhận” + traceInfo[ 0 ].customer_fullname + “\n”
+ “Số điện thoại” + traceInfo[ 0 ].customer_tel + “\n”
})
}