Including remote gitlabci - Undefined Error

Hey everyone,

I have an .gitlab-ci.yml using the include remote:

include:
  remote: 'http://myprivategitlab.com/test_group/terraform/raw/master/.terraform-validate.yml'

And the remote file terraform-validate.yml (this repository has the public access):

image:
  name: hashicorp/terraform:latest
  entrypoint:
    - '/usr/bin/env'
    - 'PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'

before_script:
  - rm -rf .terraform
  - terraform --version
  - terraform init

stages:
  - validate

validate:
  stage: validate
  script:
    - terraform validate
  only:
    - master
    - develop

But, i receive this error from the GitlabCi Lint:

Found errors in your .gitlab-ci.yml:
Undefined error
You can also test your .gitlab-ci.yml in CI Lint

I’ve tried move this repository to outside the group, but i’s not working too.

I’m using Gitlab version 11.11.0 CE

Any suggestion?, i’m following the docs: https://docs.gitlab.com/ee/ci/yaml/includes.html

Best regards,