AttributeError during Maintenance

[jTiKey]

AttributeError at /api/payments/create_package_charge/3/ 'NoneType' object has no attribute 'get'

File "/coinbase_commerce/api_resources/base/create_api_resource.py" in create
  12.         response = cls._api_client.post(cls.RESOURCE_PATH, data=params)

File "/coinbase_commerce/client.py" in post
  109.         return self._request('post', *args, **kwargs)

File "/coinbase_commerce/client.py" in _request
  79.             proceeded_response = self._proceed_response(response)

File "/coinbase_commerce/client.py" in _proceed_response
  84.             raise build_api_error(response)

File "/coinbase_commerce/error.py" in build_api_error
  109.     error_id = error.get('type', '')

The response:

{"type":"maintenance","message":"Coinbase Commerce is under maintenance. Follow @commercecb on Twitter for more information."}'