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Hi all, seeing this error with docker run : Unexpected error: TypeError("'NoneType' object is not subscriptable")
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/prefect/engine/runner.py", line 48, in inner
    new_state = method(self, state, *args, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/prefect/engine/task_runner.py", line 869, in get_task_run_state
    logger=self.logger,
  File "/usr/local/lib/python3.7/site-packages/prefect/utilities/executors.py", line 299, in run_task_with_timeout
    return task.run(*args, **kwargs)  # type: ignore
  File "&lt;string&gt;", line 519, in delta_push
TypeError: 'NoneType' object is not subscriptable

Any ideas?

Can you share the output of `prefect version` ? Can you share the code that gave you that error?

i am trying to run 80 flows in 10 batches with interval clock of 10 mins each..

this is not code error i think? it looks like prefect client issue?

Why do you use this specific version? Can you upgrade to the latest Prefect 1.0 version which is now at 1.2.2