Hi there, I find it a bit confusing that when running the tutorial without a local prefect instance, it just works fine for me doing:

prefect backend server

python 03_parameterized_etl_flow.py

I can spin it up without problems using

prefect server start

but I was just curious what would happen in the examples without, so I stopped it and ran into the issue. Am I doing it wrong or did I miss some important concept here?

Hey @holger brandl! Sorry I missed this. Prefect core with

flow.run()

will still work without the backend. You need the backend to register. You also may not be aware Prefect Cloud has 10k free task runs per month, which saves you the pain of spinning server and is more than enough to get started with