The code - slight changes from the examples in docs*

# flow_report.py
from prefect.executors import DaskExecutor
from prefect import Flow, task

# define a simple task and flow
@Aui Task
def hello():
  return "hi"

with Flow('performance_report') as flow:
  x = hello()

# specify where the executor should write the performance report
flow.executor = DaskExecutor(performance_report_path="/Users/tomercagan/dev/prefect-play/performance_report.html")

* changes - remove

import os

in the top, and update the path

prefect run -p flow_report.py Retrieving local flow... Done Running flow locally... └── 14:19:57 | INFO | Beginning Flow run for 'performance_report' └── 14:19:57 | INFO | Creating a new Dask cluster with

distributed.deploy.local.LocalCluster

... └── 14:19:58 | INFO | The Dask dashboard is available at http://127.0.0.1:8787/status └── 14:19:59 | ERROR | Unexpected error: ValueError('No global client found and no address provided') Traceback (most recent call last): File "/Users/tomercagan/dev/prefect-play/venv/lib/python3.9/site-packages/prefect/engine/runner.py", line 48, in inner new_state = method(self, state, *args, **kwargs) File "/Users/tomercagan/dev/prefect-play/venv/lib/python3.9/site-packages/prefect/engine/flow_runner.py", line 442, in get_flow_run_state with self.check_for_cancellation(), executor.start(): File "/usr/local/Cellar/python@3.9/3.9.10/Frameworks/Python.framework/Versions/3.9/lib/python3.9/contextlib.py", line 119, in enter return next(self.gen) File "/Users/tomercagan/dev/prefect-play/venv/lib/python3.9/site-packages/prefect/executors/dask.py", line 253, in start with performance_report_context: File "/Users/tomercagan/dev/prefect-play/venv/lib/python3.9/site-packages/distributed/client.py", line 5418, in enter get_client().sync(self.aenter) File "/Users/tomercagan/dev/prefect-play/venv/lib/python3.9/site-packages/distributed/worker.py", line 4296, in get_client raise ValueError("No global client found and no address provided") ValueError: No global client found and no address provided └── 14:19:59 | ERROR | Unexpected error occured in FlowRunner: ValueError('No global client found and no address provided') Flow run failed!

From what I see, it is not able to retrieve the client while running setting up the performance report. This does not happens when not specifying the path to the report in the

DaskExecutor

constructor

what does this do?