execute 'vagrant provision' with failures

[gnigats]

after vagrant up I issued 'vagrant provision' and got the following error.
checking each of the path, they seem alright. what can be the problem? please help !

==> postfix.vagrant.local: Running provisioner: ansible...
PYTHONUNBUFFERED=1 ANSIBLE_FORCE_COLOR=true ANSIBLE_HOST_KEY_CHECKING=false ANSIBLE_SSH_ARGS='-o UserKnownHostsFile=/dev/null -o ControlMaster=auto -o ControlPersist=60s' ansible-playbook --private-key=C:/cygwin64/home/jclin/boxes/ansible-vagrant-postfix/.vagrant/machines/postfix.vagrant.local/virtualbox/private_key --user=vagrant --connection=ssh --limit='postfix.vagrant.local' --inventory-file=C:/cygwin64/home/jclin/boxes/ansible-vagrant-postfix/.vagrant/provisioners/ansible/inventory playbook.yml
The system cannot find the path specified.
Ansible failed to complete successfully. Any error output should be
visible above. Please fix these errors and try again.

[rahulbhat]

Even I'm facing same issue, were you able to resolve this?