ocp_deprovision role error: ipi_platform is undefined

[mudspringhiker]

When running ocp_deprovision for OCP in AWS, the following error occurred:

TASK [ibm.mas_devops.ocp_deprovision : ipi : Fail if required parameters are not provided (AWS)] ****************************
fatal: [localhost]: FAILED! =>
  msg: |-
    The conditional check 'ipi_platform == "aws"' failed. The error was: error while evaluating conditional (ipi_platform == "aws"): 'ipi_platform' is undefined. 'ipi_platform' is undefined

    The error appears to be in '/opt/app-root/lib64/python3.9/site-packages/ansible_collections/ibm/mas_devops/roles/ocp_deprovision/tasks/providers/ipi.yml': line 17, column 3, but may
    be elsewhere in the file depending on the exact syntax problem.

    The offending line appears to be:

    # that seems rather redundant at present.
    - name: "ipi : Fail if required parameters are not provided (AWS)"
      ^ here
    This one looks easy to fix. It seems that there is a value started
---
    with a quote, and the YAML parser is expecting to see the line ended
    with the same kind of quote. For instance:

        when: "ok" in result.stdout

    Could be written as:

       when: '"ok" in result.stdout'

    Or equivalently:

       when: "'ok' in result.stdout"

NO MORE HOSTS LEFT **********************************************************************************************************

PLAY RECAP ******************************************************************************************************************
localhost                  : ok=6    changed=0    unreachable=0    failed=1    skipped=1    rescued=0    ignored=0

[ibmmas/cli:7.11.1]mascli$

Adding ipi_platform: "{{ lookup('env', 'IPI_PLATFORM') }}" to /opt/app-root/lib64/python3.9/site-packages/ansible_collections/ibm/mas_devops/roles/ocp_deprovision/defaults/main.yml resolved the issue.