More verbose if stream not created error

[earthpyy]

Current error:

Task exception was never retrieved
future: <Task finished name='Task-1' coro=<Command.nats_coroutine() done, defined at /usr/local/lib/python3.8/site-packages/nats_client/management/commands/nats_listener.py:60> exception=TypeError("'NoneType' object is not subscriptable")>
Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/nats_client/management/commands/nats_listener.py", line 118, in nats_coroutine
    psub = await self.js.pull_subscribe(
  File "/usr/local/lib/python3.8/site-packages/nats/js/client.py", line 376, in pull_subscribe
    stream = await self._jsm.find_stream_name_by_subject(subject)
  File "/usr/local/lib/python3.8/site-packages/nats/js/manager.py", line 62, in find_stream_name_by_subject
    return info['streams'][0]
TypeError: 'NoneType' object is not subscriptable