[BUG] Error: `No extension registered which can handle flow` when using 'get_flow()' with `reinstantiate=True`

[EmanAbdelhaleem]

Details

When trying to use get_flow(1) with reinstantiate=True the following error is raised:
ValueError: No extension registered which can handle flow: 1 (openml.evaluation.EuclideanDistance).

It's the same with all the different flow ids I have tried.

To reproduce

from openml.flows.functions import get_flow
flow = get_flow(1, reinstantiate=True)

Expected Behaviour

Things should work.

[geetu040]

you can try a different flow from catalogue which uses sklearn, but that will lead to another problem that all the sklearn tagged flows I see there are bounded to version 0.20.x or less

[fkiraly]

these are ancient versions.

We have already discussed about decoupling the concept of estimator instansces from versions - but maybe we also should consider this for flows somehow?