environment is not a valid YAML mapping data type error when deploying with Director UI

Issue

• clicking paramters in director UI causes it to log out
• Unable to deploy using director UI
• The environment is not a valid YAML mapping data type
  /var/log/messages from the director

Feb 15 11:09:05 undercloud proxy-server: 172.31.100.11 172.31.100.11 15/Feb/2017/16/09/05 GET /v1/AUTH_a4fe8e53842b4b4baf09c032cbc65427/overcloud/environments/manage-firewall.yaml HTTP/1.0 404 - python-requests/2.10.0 f226872917df4d54... - 70 - txbd1ef22d5e59461fa8a21-0058a47d21 - 0.0051 - - 1487174945.771353960 1487174945.776463032 0
Feb 15 11:09:05 undercloud mistral-server: 2017-02-15 11:09:05.780 12512 ERROR tripleo_common.actions.templates [-] Error occurred while processing plan files.
Feb 15 11:09:05 undercloud mistral-server: 2017-02-15 11:09:05.780 12512 ERROR tripleo_common.actions.templates Traceback (most recent call last):
Feb 15 11:09:05 undercloud mistral-server: 2017-02-15 11:09:05.780 12512 ERROR tripleo_common.actions.templates   File "/usr/lib/python2.7/site-packages/tripleo_common/actions/templates.py", line 252, in run
Feb 15 11:09:05 undercloud mistral-server: 2017-02-15 11:09:05.780 12512 ERROR tripleo_common.actions.templates     object_request=_object_request))
Feb 15 11:09:05 undercloud mistral-server: 2017-02-15 11:09:05.780 12512 ERROR tripleo_common.actions.templates   File "/usr/lib/python2.7/site-packages/heatclient/common/template_utils.py", line 247, in process_multiple_environments_and_files
Feb 15 11:09:05 undercloud mistral-server: 2017-02-15 11:09:05.780 12512 ERROR tripleo_common.actions.templates     include_env_in_files=include_env_in_files)
Feb 15 11:09:05 undercloud mistral-server: 2017-02-15 11:09:05.780 12512 ERROR tripleo_common.actions.templates   File "/usr/lib/python2.7/site-packages/heatclient/common/template_utils.py", line 290, in process_environment_and_files
Feb 15 11:09:05 undercloud mistral-server: 2017-02-15 11:09:05.780 12512 ERROR tripleo_common.actions.templates     env = environment_format.parse(raw_env)
Feb 15 11:09:05 undercloud mistral-server: 2017-02-15 11:09:05.780 12512 ERROR tripleo_common.actions.templates   File "/usr/lib/python2.7/site-packages/heatclient/common/environment_format.py", line 50, in parse
Feb 15 11:09:05 undercloud mistral-server: 2017-02-15 11:09:05.780 12512 ERROR tripleo_common.actions.templates     raise ValueError(_('The environment is not a valid '
Feb 15 11:09:05 undercloud mistral-server: 2017-02-15 11:09:05.780 12512 ERROR tripleo_common.actions.templates ValueError: The environment is not a valid YAML mapping data type.