Error saying my pipeline has a step section empty or null

[kalib]

I keep receiving this error message:

There is an error in your bitbucket-pipelines.yml at [pipelines > branches > fixing-yaml > 0 > parallel > 4]. To be precise: The step section is empty or null.

It doesn't make any sense to me, I have nothing empty. even Atlassian's validator online says it's all good.

Also, the pipeline works fine, until I add another step, and it shows that.

clone:
  depth: full

definitions:
  caches:
    sonar: ~/.sonar

steps:
  - step: &lint
      name: Lint
      script:
        - echo "Add linting here"

  - step: &aws
      name: AWS oidc setup
      image: amazon/aws-cli
      oidc: true
      script:
        - export AWS_REGION=us-east-1
        - yum update
        - yum install -y jq

  - step: &sonarqube
      name: SAST - SonarQube
      runs-on:
        - self.hosted
        - linux
      script:
        - pipe: sonarsource/sonarqube-scan:1.0.0
          variables:
            SONAR_HOST_URL: ${SONAR_HOST_URL}
            SONAR_TOKEN: ${SONAR_TOKEN}

  - step: &unit-test
      name: Unit Test
      script:
        - echo "Add Unit Tests here"

  - step: &build
      name: Build
      script:
        - ./cicd/build.sh
      services:
        - docker
      caches:
        - docker

  - step: &deliver
      name: Deliver
      script:
        - ./cicd/promote.sh

pipelines:
  default: # Runs on every commit for branches not defined elsewhere
  # - step: *sonarqube
    - parallel:
        - step: *lint
        - step: *unit-test
        - step: *build

pull-requests:
'**': # this runs as default for any branch not elsewhere defined
  # - step: *sonarqube
    - parallel:
        - step: *lint
        - step: *unit-test
        - step: *build

branches: # these will run on every push of the branch
  master:
  # - step: *sonarqube
    - parallel:
    - step: *lint
    - step: *aws
    - step: *unit-test
    - step: *build
    - step: *deliver

This code results in that error:

There is an error in your bitbucket-pipelines.yml at [pipelines > branches > fixing-yaml > 0 > parallel > 4]. To be precise: The step section is empty or null.

But, if I simply remove the last step, leaving as:

...

...

branches: # these will run on every push of the branch
 master:
 # - step: *sonarqube
   - parallel:
   - step: *lint
   - step: *aws
   - step: *unit-test
   - step: *build

It works fine. I can't make sense of it. Any help or suggestions?

[kalib · Accepted solution]

Nevermind.. Found my error... I had a few spaces missing.. indentation.