Ansible error

ansible-playbook -l poc ./playbooks/services/poc.yml -k -u root --ask-vault-pass -vvvvv
SSH password:
Vault password:

PLAY [Install POC server] *****************************************************

GATHERING FACTS ***************************************************************
<******> ESTABLISH CONNECTION FOR USER: root
<******> REMOTE_MODULE setup
<*******> EXEC sshpass -d8 ssh -C -tt -vvv -o ControlMaster=auto -o ControlPersist=60s -o ControlPath="/home/tom/.ansible/cp/ansible-ssh-%h-%p-%r" -o StrictHostKeyChecking=no -o GSSAPIAuthentication=no -o PubkeyAuthentication=no -o User=root -o ConnectTimeout=10 10.96.123.110 /bin/sh -c 'mkdir -p $HOME/.ansible/tmp/ansible-tmp-1495551001.53-20819085062184 && echo $HOME/.ansible/tmp/ansible-tmp-1495551001.53-20819085062184'
fatal: [****] => SSH Error: Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password,keyboard-interactive).
    while connecting to ******:22
It is sometimes useful to re-run the command using -vvvv, which prints SSH debug output to help diagnose the issue.

TASK: [ntp_server | ntp install] **********************************************
FATAL: no hosts matched or all hosts have already failed -- aborting


PLAY RECAP ********************************************************************
           to retry, use: --limit @/home/tom /poc.retry
***             : ok=0    changed=0    unreachable=1    failed=0