Error installing ficus.master on AWS

err.log

TASK [notifier : Check if incommon ca is installed] ****************************
fatal: [localhost]: FAILED! => {"changed": true, "cmd": ["test", "-e", "/usr/share/ca-certificates/incommon/InCommonServerCA.crt"], "delta": "0:00:00.003425",
 "end": "2017-12-10 09:49:10.940451", "failed": true, "rc": 1, "start": "2017-12-10 09:49:10.937026", "stderr": "", "stdout": "", "stdout_lines": [], "warning
s": []}
...ignoring

TASK [notifier : Create incommon ca directory] *********************************
changed: [localhost]

TASK [notifier : Retrieve incommon server CA] **********************************
fatal: [localhost]: FAILED! => {"changed": false, "failed": true, "msg": "Failed to validate the SSL certificate for www.incommon.org:443. Make sure your mana
ged systems have a valid CA certificate installed. You can use validate_certs=False if you do not need to confirm the servers identity but this is unsafe and
not recommended. Paths checked for this platform: /etc/ssl/certs, /etc/pki/ca-trust/extracted/pem, /etc/pki/tls/certs, /usr/share/ca-certificates/cacert.org,
/etc/ansible"}

RUNNING HANDLER [nginx : reload nginx] *****************************************

RUNNING HANDLER [forum : restart the forum service] ****************************
        to retry, use: --limit @/var/tmp/configuration/playbooks/edx_sandbox.retry
        
PLAY RECAP *********************************************************************
localhost                  : ok=459  changed=342  unreachable=0    failed=1