How to generate a Self Signed OpenSSL certificate? FAILED! => {"msg": "Wrong or empty passphrase provided for private key"}

My yaml for certificates

- name: Ensure directory exists for local self-signed TLS certs.
  file:
    path: "{{ certificate_dir }}/{{ server_hostname }}"
    state: directory

- name: Generate an OpenSSL private key.
  community.crypto.openssl_privatekey:
    path: "{{ certificate_dir }}/{{ server_hostname }}/privkey.pem"
    size: 2048
    type: DSA
    backup: yes
    cipher: auto
    passphrase: ansible


- name: Generate an OpenSSL CSR.
  community.crypto.openssl_csr:
    path: "{{ certificate_dir }}/{{ server_hostname }}.csr"
    privatekey_path: "{{ certificate_dir }}/{{ server_hostname }}/privkey.pem"
    privatekey_passphrase: ansible
    common_name: "{{ server_hostname }}"

- name: Generate a Self Signed OpenSSL certificate.
  community.crypto.x509_certificate:
    path: "{{ certificate_dir }}/{{ server_hostname }}/fullchain.pem"
    privatekey_path: "{{ certificate_dir }}/{{ server_hostname }}/privkey.pem"
    csr_path: "{{ certificate_dir }}/{{ server_hostname }}.csr"
    provider: selfsigned

When I run ansible playbook I got error

TASK [Generate a Self Signed OpenSSL certificate.] *****************************
fatal: [default]: FAILED! => {"changed": false, "msg": "Wrong or empty passphrase provided for private key"}

I looked at x509 exmaples

 community.crypto.x509_certificate:
    path: /etc/ssl/crt/ansible.com.crt
    privatekey_path: /etc/ssl/private/ansible.com.pem
    csr_path: /etc/ssl/csr/ansible.com.csr
    provider: selfsigned

No password at all.
Why I am getting error like the above posted?

As i stated on the comments you forgot to put the passphrase that you used on the second step:

 community.crypto.x509_certificate:
    path: /etc/ssl/crt/ansible.com.crt
    privatekey_path: /etc/ssl/private/ansible.com.pem
    csr_path: /etc/ssl/csr/ansible.com.csr
    provider: selfsigned
    privatekey_passphrase: ansible

More on: Doc about x509