Http.json: unexpected end of JSON input

Elastic Stack Beats
1

Hi team,
I am trying to get metrics on an API call. My call works on Postman, however, I am getting this error when I run metricbeat:

{"log.level":"error","@timestamp":"2024-04-09T11:51:35.572Z","log.origin":{"function":"github.com/elastic/beats/v7/metricbeat/mb/module.(*metricSetWrapper).fetch","file.name":"module/wrapper.go","file.line":256},"message":"Error fetching data for metricset http.json: unexpected end of JSON input","service.name":"metricbeat","ecs.version":"1.6.0"}

My http,yml file is:

- module: http
  metricsets:
    - json
  period: 5s
  hosts: [ "http://<ip_address>:<port>" ]
  namespace: "tmc"
  path: "/metrics/json"
  ssl.verification_mode: "none"
  #body: ""
  headers:
  Authorization: "Bearer <token>"
  method: "GET"
  #username: "user"
  #password: "secret"
  request.enabled: true
  response.enabled: true
  json.is_array: true
  #dedot.enabled: false