PSRP do not read vault files

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Hello, this is my ansible version:

ansible [core 2.20.5]
  config file = /home/ansible-dev/ansible-projects/ansible-infra/ansible.cfg
  configured module search path = ['/home/ansible-dev/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /home/ansible-dev/.ansible-venv/lib/python3.13/site-packages/ansible
  ansible collection location = /home/ansible-dev/.ansible/collections:/usr/share/ansible/collections
  executable location = /home/ansible-dev/.ansible-venv/bin/ansible
  python version = 3.13.5 (main, Jun 25 2025, 18:55:22) [GCC 14.2.0] (/home/ansible-dev/.ansible-venv/bin/python3)
  jinja version = 3.1.6
  pyyaml version = 6.0.3 (with libyaml v0.2.5)

And I am trying to use PSRP 0.9.1

I have an issue with a simple playbook that contains only a ping and gathering of os version (Windows Server 2019)

The problem is that if I put connection properties in the inventory or in the playbook, this one works. If I try to put the same parameters in host_vars or group_vars folders (I tried both encrypted o not encrypted vault versions) I have this error:

TASK [Ping WinRM] ***********************************************************************************************************************************************************************************************************************************
task path: /home/ansible-dev/ansible-projects/ansible-infra/playbooks/windows/test_win.yml:7
[ERROR]: Task failed: Failed to connect to the host via ssh: ssh: connect to host 10.39.201.165 port 22: Connection refused
Origin: /home/ansible-dev/ansible-projects/ansible-infra/playbooks/windows/test_win.yml:7:7

5
6   tasks:
7     - name: Ping WinRM
        ^ column 7

fatal: [tgrp-test]: UNREACHABLE! => {
    "changed": false,
    "msg": "Task failed: Failed to connect to the host via ssh: ssh: connect to host 10.39.201.165 port 22: Connection refused",
    "unreachable": true
}

PLAY RECAP ******************************************************************************************************************************************************************************************************************************************
tgrp-test                  : ok=0    changed=0    unreachable=1    failed=0    skipped=0    rescued=0    ignored=0

This is my laybook:

---
- name: Test connettività Windows 2019
  hosts: cusona_windows
  gather_facts: false
  vars:
    ansible_connection: psrp
    ansible_port: 5985
    ansible_psrp_auth: ntlm
    ansible_user: "foo"
    ansible_password: "bar"
    ansible_psrp_cert_validation: ignore
  tasks:
    - name: Ping WinRM
      ansible.windows.win_ping:

    - name: Info SO
      ansible.windows.setup:

    - name: Mostra versione
      debug:
        var: ansible_os_name

This is the inventory occurrence:

tgrp-test ansible_host=10.39.201.165

I have several windows machine out of the domain with their own users and passwords, and I wuold like to avoid to put user and passwords in inventory or in the playbooks.

Can you please help me to understand why I have this behavior?

Thanks in advance.

Very kind regards.

Alessio