Older Ansible not supported any more? Getting "'ssl_certificate' is undefined"

[centic9]

Trying to run the current version of this role from Galaxy, I get the following when using Ansible 2.0.0 (the latest on base Ubuntu Xenial):

TASK [../../roles/thefinn93.letsencrypt : Create directory for `ssl_certificate` and `ssl_certificate_key`] ***
task path: /opt/svn/Ansible/roles/thefinn93.letsencrypt/tasks/main.yml:86
fatal: [vserver]: FAILED! => {"failed": true, "msg": "ERROR! 'ssl_certificate' is undefined"}

It looks like the with_items is not supported with "when"?

  - name: Create directory for `ssl_certificate` and `ssl_certificate_key`
    file:
      path: '{{ item }}'
      state: directory
      recurse: yes
    when: ssl_certificate is defined and ssl_certificate_key is defined
    with_items:
      - "{{ ssl_certificate|dirname }}"
      - "{{ ssl_certificate_key|dirname }}"

If I change that to the following it seems to work:

  - name: Create directory for `ssl_certificate` and `ssl_certificate_key`
    file:
      path: "{{ ssl_certificate_key|dirname }}"
      state: directory
      recurse: yes
    when: ssl_certificate is defined and ssl_certificate_key is defined

  - name: Create directory for `ssl_certificate` and `ssl_certificate_key`
    file:
      path: "{{ ssl_certificate|dirname }}"
      state: directory
      recurse: yes
    when: ssl_certificate is defined and ssl_certificate_key is defined

  - name: Symlink certificates to `ssl_certificate` and `ssl_certificate_key`
    file:
      src: /etc/letsencrypt/live/{{ letsencrypt_cert_domains[0] }}/fullchain.pem
      dest: "{{ssl_certificate}}"
      state: link
    when: ssl_certificate is defined and ssl_certificate_key is defined

  - name: Symlink certificates to `ssl_certificate` and `ssl_certificate_key`
    file:
      src: /etc/letsencrypt/live/{{ letsencrypt_cert_domains[0] }}/privkey.pem
      dest: "{{ssl_certificate_key}}"
      state: link
    when: ssl_certificate is defined and ssl_certificate_key is defined