ERROR:uvicorn.error:Traceback (most recent call last):


 "/usr/local/lib/python3.7/site-packages/starlette/routing.py", line 473, in __call__

await self.startup()


 "/usr/local/lib/python3.7/site-packages/starlette/routing.py", line 457, in startup

await handler()


 "/usr/local/lib/python3.7/site-packages/tortoise/contrib/starlette/__init__.py", line 80, in init_orm

await Tortoise.generate_schemas()


 "/usr/local/lib/python3.7/site-packages/tortoise/__init__.py", line 682, in generate_schemas

await generate_schema_for_client(connection, safe)


 "/usr/local/lib/python3.7/site-packages/tortoise/utils.py", line 16, in generate_schema_for_client

await generator.generate_from_string(schema)


 "/usr/local/lib/python3.7/site-packages/tortoise/backends/base/schema_generator.py", line 374, in generate_from_string

await self.client.execute_script(creation_string)


 "/usr/local/lib/python3.7/site-packages/tortoise/backends/asyncpg/client.py", line 33, in translate_exceptions_

return await func(self, *args)


 "/usr/local/lib/python3.7/site-packages/tortoise/backends/asyncpg/client.py", line 173, in execute_script

await connection.execute(query)


 "/usr/local/lib/python3.7/site-packages/asyncpg/connection.py", line 272, in execute

return await self._protocol.query(query, timeout)


 "asyncpg/protocol/protocol.pyx", line 316, in query


 "asyncpg/protocol/protocol.pyx", line 807, in asyncpg.protocol.protocol.BaseProtocol._dispatch_result


 "asyncpg/protocol/protocol.pyx", line 734, in asyncpg.protocol.protocol.BaseProtocol._on_result__simple_query
AttributeError: 'NoneType' object has no attribute 'decode'

Traceback (most recent call last):


 "clock.pyx", line 119, in hummingbot.core.clock.Clock.run_til


 "pure_market_making_v2.pyx", line 292, in hummingbot.strategy.pure_market_making.pure_market_making_v2.PureMarketMakingStrategyV2.c_tick


 "pass_through_filter_delegate.pyx", line 22, in hummingbot.strategy.pure_market_making.pass_through_filter_delegate.PassThroughFilterDelegate.c_filter_orders_proposal
AttributeError: 'NoneType' object has no attribute 'actions'
