Переписал всё, сейчас вроде как отрабатывает без ошибок

roles/pleroma_postinstall/tasks/debian.yml

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+- name: Copy temp Nginx config
+  ansible.builtin.template:
+    src: pleroma.nginx.j2
+    dest: /etc/nginx/sites-enabled/pleroma.conf
+    mode: '0644'
+
+- name: Reload Nginx
+  ansible.builtin.service:
+    name: nginx
+    state: reloaded

roles/pleroma_postinstall/tasks/main.yml

@@ -0,0 +1,59 @@
+- name: Copy SystemD service
+  ansible.builtin.copy:
+    remote_src: true
+    src: /opt/pleroma/installation/pleroma.service
+    dest: /etc/systemd/system/pleroma.service
+    mode: '0644'
+
+- name: Start Pleroma service
+  ansible.builtin.systemd_service:
+    daemon_reload: true
+    name: pleroma
+    enabled: true
+    state: started
+
+- name: Check Pleroma work
+  ansible.builtin.uri:
+    url: http://localhost:4000/api/pleroma/healthcheck
+    method: GET
+  register: result
+  until: result.status != -1
+  retries: 5
+  delay: 20
+
+- name: Get admin username
+  ansible.builtin.pause:
+    prompt: Input admin username
+  register: result
+
+- name: Set admin username
+  ansible.builtin.set_fact:
+    pleroma_postinstall_admin: "{{ result.user_input }}"
+
+- name: Get admin email
+  ansible.builtin.pause:
+    prompt: Input admin email
+  register: result
+
+- name: Set admin email
+  ansible.builtin.set_fact:
+    pleroma_postinstall_admin_email: "{{ result.user_input }}"
+
+- name: Generate admin password
+  ansible.builtin.set_fact:
+    pleroma_postinstall_admin_password: "{{ lookup('community.general.random_string', length=12, special=false) }}"
+
+- name: Create user
+  become: true
+  become_user: pleroma
+  environment:
+    - MIX_ENV: prod
+  ansible.builtin.shell:
+    chdir: /opt/pleroma
+    cmd: |
+      mix pleroma.user new {{ pleroma_postinstall_admin }} {{ pleroma_postinstall_admin_email }} --password {{ pleroma_postinstall_admin_password }} -y --admin
+
+- name: Check Debian
+  when: ansible_facts["distribution"] == "Debian"
+  ansible.builtin.include_tasks:
+    file: debian.yml