manage.py loaddata website_data.json error

ceback (most recent call last):
  File "manage.py", line 7, in <module>
    startup.manage(path=os.path.dirname(os.path.abspath(__file__)))
  File "/virtualenv/lib/python3.5/site-packages/aldryn_django/startup.py", line 11, in manage
    utility.execute()
  File "/virtualenv/lib/python3.5/site-packages/django/core/management/__init__.py", line 346, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/virtualenv/lib/python3.5/site-packages/django/core/management/base.py", line 394, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/virtualenv/lib/python3.5/site-packages/django/core/management/base.py", line 445, in execute
    output = self.handle(*args, **options)
  File "/virtualenv/lib/python3.5/site-packages/django/core/management/commands/loaddata.py", line 60, in handle
    self.loaddata(fixture_labels)
  File "/virtualenv/lib/python3.5/site-packages/django/core/management/commands/loaddata.py", line 100, in loaddata
    self.load_label(fixture_label)
  File "/virtualenv/lib/python3.5/site-packages/django/core/management/commands/loaddata.py", line 151, in load_label
    for obj in objects:
  File "/virtualenv/lib/python3.5/site-packages/django/core/serializers/json.py", line 85, in Deserializer
    six.reraise(DeserializationError, DeserializationError(e), sys.exc_info()[2])
  File "/virtualenv/lib/python3.5/site-packages/django/utils/six.py", line 685, in reraise
    raise value.with_traceback(tb)
  File "/virtualenv/lib/python3.5/site-packages/django/core/serializers/json.py", line 79, in Deserializer
    for obj in PythonDeserializer(objects, **options):
  File "/virtualenv/lib/python3.5/site-packages/django/core/serializers/python.py", line 96, in Deserializer
    Model = _get_model(d["model"])
django.core.serializers.base.DeserializationError: Problem installing fixture '/app/website_data.json': string indices must be integers

Error: string indeices must be integers