MODULE FAILURE\nSee stdout/stderr for the exact error - ansible

Question

I am trying to create the user account using ansible on Ubuntu20.04. But getting error:
msg": "MODULE FAILURE\nSee stdout/stderr for the exact error",
"rc": 1
But same playbook is working fine for Ubuntu 18.04.
Below is my playbook:
- hosts: abc
remote_user: root
become: true
tasks:
- name: create user account admin with password xyz
user:
name: admin
group: admin
shell: /bin/bash
password: $6$pLkiHBvZOf9/zctp1SlLXC2PsTFfwwcwmE73wuwwXb2g8.
append: yes
- name: ceating .ssh directory for account admin
file:
path: /home/admin/.ssh
state: directory
group: admin
owner: admin
mode: 0755
- name: copy authorized_keys file from root
copy:
src: /root/.ssh/authorized_keys
dest: /home/admin/.ssh
remote_src: yes
group: admin
owner: admin
- name: change the ssh port
lineinfile:
path: /etc/ssh/sshd_config
state: present
insertafter: '#Port 22'
line: "Port 811"
backup: yes
- name: disable the root login
lineinfile:
path: /etc/ssh/sshd_config
regexp: '^PermitRootLogin yes'
line: 'PermitRootLogin no'
- name: Restart ssh
service: name=ssh state=restarted
Can you please help me what is the error cause?
Thank you

Answer 1

You can usually get more information from ansible by capturing the error and emitting it:
- name: create user account admin with password xyz
user:
name: admin
group: admin
shell: /bin/bash
password: $6$pLkiHBvZOf9/zctp1SlLXC2PsTFfwwcwmE73wuwwXb2g8.
append: yes
ignore_errors: yes
register: kaboom
- debug: var=kaboom
- fail: msg=yup
and you will get the most information by also running ansible with env ANSIBLE_DEBUG=1 ansible-playbook -vvvv although often times the extra verbosity still isn't enough to get it to surface the actual exception text, so try that register: trick first