ansible-error

root@os-node01:/opt/openstack-ansible/playbooks# openstack-ansible setup-hosts.yml
Variable files: "-e @/etc/openstack_deploy/user_secrets.yml -e @/etc/openstack_deploy/user_variables.yml "
Traceback (most recent call last):
  File "/usr/local/bin/ansible-playbook", line 324, in <module>
    sys.exit(main(sys.argv[1:]))
  File "/usr/local/bin/ansible-playbook", line 144, in main
    extra_vars = utils.parse_extra_vars(options.extra_vars, vault_pass)
  File "/usr/local/lib/python2.7/dist-packages/ansible/utils/__init__.py", line 1081, in parse_extra_vars
    extra_vars = combine_vars(extra_vars, parse_yaml_from_file(extra_vars_opt[1:], vault_password=vault_pass))
  File "/usr/local/lib/python2.7/dist-packages/ansible/utils/__init__.py", line 780, in parse_yaml_from_file
    process_yaml_error(exc, data, path, show_content)
  File "/usr/local/lib/python2.7/dist-packages/ansible/utils/__init__.py", line 713, in process_yaml_error
    %s""" % (path, mark.line + 1, mark.column + 1, before_probline, probline, arrow)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc2 in position 0: ordinal not in range(128)