Traceback (most recent call last):


 "/usr/local/bin/prefect", line 8, in <module>

sys.exit(cli())


 "/usr/local/lib/python3.7/site-packages/click/core.py", line 764, in __call__

return self.main(*args, **kwargs)


 "/usr/local/lib/python3.7/site-packages/click/core.py", line 717, in main

rv = self.invoke(ctx)


 "/usr/local/lib/python3.7/site-packages/click/core.py", line 1137, in invoke

return _process_result(sub_ctx.command.invoke(sub_ctx))


 "/usr/local/lib/python3.7/site-packages/click/core.py", line 1137, in invoke

return _process_result(sub_ctx.command.invoke(sub_ctx))


 "/usr/local/lib/python3.7/site-packages/click/core.py", line 956, in invoke

return ctx.invoke(self.callback, **ctx.params)


 "/usr/local/lib/python3.7/site-packages/click/core.py", line 555, in invoke

return callback(*args, **kwargs)


 "/usr/local/lib/python3.7/site-packages/prefect/cli/execute.py", line 79, in cloud_flow

raise exc


 "/usr/local/lib/python3.7/site-packages/prefect/cli/execute.py", line 71, in cloud_flow

storage=storage, flow_location=storage.flows[flow_data.name]


 "/usr/local/lib/python3.7/site-packages/prefect/environments/execution/remote.py", line 68, in execute

if self.on_start:
AttributeError: 'RemoteEnvironment' object has no attribute 'on_start'

Traceback (most recent call last):


 "test.py", line 12, in <module>

async_to_sync(channel_layer.send)('test_channel', {'type': 'hello'})


 "/root/anaconda3/lib/python3.5/site-packages/asgiref/sync.py", line 64, in __call__

return call_result.result()


 "/root/anaconda3/lib/python3.5/concurrent/futures/_base.py", line 398, in result

return self.__get_result()


 "/root/anaconda3/lib/python3.5/concurrent/futures/_base.py", line 357, in __get_result

raise self._exception


 "/root/anaconda3/lib/python3.5/site-packages/asgiref/sync.py", line 78, in main_wrap

result = await self.awaitable(*args, **kwargs)


 "/root/anaconda3/lib/python3.5/site-packages/channels_redis/core.py", line 132, in send

async with self.connection(index) as connection:


 "/root/anaconda3/lib/python3.5/site-packages/channels_redis/core.py", line 399, in __aenter__

self.conn = await aioredis.create_redis(**self.kwargs)


 "/root/anaconda3/lib/python3.5/site-packages/aioredis/commands/__init__.py", line 174, in create_redis

loop=loop)


 "/root/anaconda3/lib/python3.5/site-packages/aioredis/connection.py", line 124, in create_connection

loop=loop)


 "/root/anaconda3/lib/python3.5/site-packages/aioredis/connection.py", line 163, in __init__

self._close_waiter = loop.create_future()
AttributeError: '_UnixSelectorEventLoop' object has no attribute 'create_future'
