example run_cluster.py not working on python3.6.3

[MazokuMaxy]

python3 run_cluster.py
INFO:root:('/home/user/dev/logs', '127.0.0.1:8002', {'127.0.0.1:8001', '127.0.0.1:8000'})
INFO:root:('/home/user/dev/logs', '127.0.0.1:8001', {'127.0.0.1:8002', '127.0.0.1:8000'})
INFO:root:('/home/user/dev/logs', '127.0.0.1:8000', {'127.0.0.1:8002', '127.0.0.1:8001'})
ERROR:asyncio:Exception in callback _SelectorDatagramTransport._read_ready()
handle: <Handle _SelectorDatagramTransport._read_ready()>
Traceback (most recent call last):
File "/usr/lib/python3.6/asyncio/events.py", line 127, in _run
self._callback(*self._args)
File "/usr/lib/python3.6/asyncio/selector_events.py", line 1078, in _read_ready
self.protocol.datagram_received(data, addr)
File "/usr/local/lib/python3.6/dist-packages/raftos/network.py", line 33, in datagram_received
self.request_handler(data)
File "/usr/local/lib/python3.6/dist-packages/raftos/server.py", line 73, in request_handler
self.state.request_handler(data)
File "/usr/local/lib/python3.6/dist-packages/raftos/state.py", line 534, in request_handler
getattr(self.state, 'on_receive{}'.format(data['type']))(data)
File "/usr/local/lib/python3.6/dist-packages/raftos/state.py", line 56, in wrapped
return func(self, *args, **kwargs)
File "/usr/local/lib/python3.6/dist-packages/raftos/state.py", line 38, in on_receive_function
return func(self, data)
File "/usr/local/lib/python3.6/dist-packages/raftos/state.py", line 219, in on_receive_append_entries_response
if data['request_id'] in self.response_map:
KeyError: 'request_id'