does not generate certificate

[acidkill]

fatal: [xxx.xxx.xx.xx]: FAILED! => {"changed": true, "cmd": "source vars; ./clean-all; yes "" | ./build-ca;", "delta": "0:00:00.012112", "end": "2019-11-21 13:29:26.228509", "msg": "non-zero return code", "rc": 127, "start": "2019-11-21 13:29:26.216397", "stderr": "You appear to be sourcing an Easy-RSA 'vars' file.\nThis is no longer necessary and is disallowed. See the section called\n'How to use this file' near the top comments for more details.\n/bin/bash: ./clean-all: No such file or directory\n/bin/bash: ./build-ca: No such file or directory", "stderr_lines": ["You appear to be sourcing an Easy-RSA 'vars' file.", "This is no longer necessary and is disallowed. See the section called", "'How to use this file' near the top comments for more details.", "/bin/bash: ./clean-all: No such file or directory", "/bin/bash: ./build-ca: No such file or directory"], "stdout": "", "stdout_lines": []}

[Yamakuprina]

You can fix this error by adding this task before "Customize CA variable configuration" task:
`

• name: "Install old easy-rsa"
  become: yes
  shell: |
  wget -O /tmp/easyrsa https://github.com/OpenVPN/easy-rsa-old/archive/2.3.3.tar.gz
  tar xfz /tmp/easyrsa
  sudo cp -rf easy-rsa-old-2.3.3/easy-rsa/2.0/* {{ ansible_env.HOME }}/openvpn-ca
  sudo chown vagrant {{ ansible_env.HOME }}/openvpn-ca
  `