Failed to create admin action.

[Debo Zhang]

In "Action" field of action create form, choose
"Admin", click "Save", then failed. I saw error
messages in apache2 log:

2017-07-11 10:37:58.728800 ERROR django.request Internal Server Error: /dashboard/disaster_recovery/actions/create/
2017-07-11 10:37:58.728913 Traceback (most recent call last):
2017-07-11 10:37:58.728924 File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py", line 149, in get_response
2017-07-11 10:37:58.728934 response = self.process_exception_by_middleware(e, request)
2017-07-11 10:37:58.728942 File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py", line 147, in get_response
2017-07-11 10:37:58.728952 response = wrapped_callback(request, *callback_args, **callback_kwargs)
2017-07-11 10:37:58.728960 File "/opt/stack/horizon/horizon/decorators.py", line 36, in dec
2017-07-11 10:37:58.728969 return view_func(request, *args, **kwargs)
2017-07-11 10:37:58.728977 File "/opt/stack/horizon/horizon/decorators.py", line 52, in dec
2017-07-11 10:37:58.728986 return view_func(request, *args, **kwargs)
2017-07-11 10:37:58.728994 File "/opt/stack/horizon/horizon/decorators.py", line 36, in dec
2017-07-11 10:37:58.729003 return view_func(request, *args, **kwargs)
2017-07-11 10:37:58.729011 File "/usr/local/lib/python2.7/dist-packages/django/views/generic/base.py", line 68, in view
2017-07-11 10:37:58.729019 return self.dispatch(request, *args, **kwargs)
2017-07-11 10:37:58.729028 File "/usr/local/lib/python2.7/dist-packages/django/views/generic/base.py", line 88, in dispatch
2017-07-11 10:37:58.729036 return handler(request, *args, **kwargs)
2017-07-11 10:37:58.729082 File "/opt/stack/horizon/horizon/workflows/views.py", line 202, in post
2017-07-11 10:37:58.729095 exceptions.handle(request)
2017-07-11 10:37:58.729103 File "/opt/stack/horizon/horizon/exceptions.py", line 362, in handle
2017-07-11 10:37:58.729112 six.reraise(exc_type, exc_value, exc_traceback)
2017-07-11 10:37:58.729120 File "/opt/stack/horizon/horizon/workflows/views.py", line 197, in post
2017-07-11 10:37:58.729128 success = workflow.finalize()
2017-07-11 10:37:58.729137 File "/opt/stack/horizon/horizon/workflows/base.py", line 842, in finalize
2017-07-11 10:37:58.729145 if not self.handle(self.request, self.context):
2017-07-11 10:37:58.729153 File "/opt/stack/freezer-web-ui/disaster_recovery/actions/workflows/action.py", line 571, in handle
2017-07-11 10:37:58.729162 exceptions.handle(request)
2017-07-11 10:37:58.729170 File "/opt/stack/horizon/horizon/exceptions.py", line 362, in handle
2017-07-11 10:37:58.729184 six.reraise(exc_type, exc_value, exc_traceback)
2017-07-11 10:37:58.729193 File "/opt/stack/freezer-web-ui/disaster_recovery/actions/workflows/action.py", line 563, in handle
2017-07-11 10:37:58.729202 freezer_api.Action(request).create(context)
2017-07-11 10:37:58.729210 File "/opt/stack/freezer-web-ui/disaster_recovery/api/api.py", line 378, in create
2017-07-11 10:37:58.729218 return self._build(action)
2017-07-11 10:37:58.729226 File "/opt/stack/freezer-web-ui/disaster_recovery/api/api.py", line 419, in _build
2017-07-11 10:37:58.729234 action['backup_name'] = backup_name.replace(' ', '_')
2017-07-11 10:37:58.729242 AttributeError: 'NoneType' object has no attribute 'replace'