"Could not validate run xml by xsd" error task 167125

When I try to run an scikit-learn model on task 167125, dataset 40978 (Internet-Advertisements) I get the error "Could not validate run xml by xsd". This happens for both flow 8317 and 8315, which work fine on other tasks.

Does anybody know why this happens and how I can fix it?

Traceback:

    run = openml.runs.run_model_on_task(task, classifier)
  File "/Users/hildeweerts/anaconda/lib/python3.6/site-packages/openml/runs/functions.py", line 40, in run_model_on_task
    flow_tags=flow_tags, seed=seed)
  File "/Users/hildeweerts/anaconda/lib/python3.6/site-packages/openml/runs/functions.py", line 84, in run_flow_on_task
    setup_id = setup_exists(flow_from_server, flow.model)
  File "/Users/hildeweerts/anaconda/lib/python3.6/site-packages/openml/setups/functions.py", line 52, in setup_exists
    file_elements=file_elements)
  File "/Users/hildeweerts/anaconda/lib/python3.6/site-packages/openml/_api_calls.py", line 52, in _perform_api_call
    file_elements=file_elements)
  File "/Users/hildeweerts/anaconda/lib/python3.6/site-packages/openml/_api_calls.py", line 98, in _read_url_files
    raise _parse_server_exception(response, url=url)
openml.exceptions.OpenMLServerException: Could not validate run xml by xsd.

Start with openml/runs/functions.py and follow the traceback through openml/setups/functions.py and openml/_api_calls.py. Reproduce the failure using task 167125, dataset 40978, and flow 8315 or 8317, then compare it with a task that succeeds. Done means identifying why the run XML fails XSD validation and documenting or fixing the behavior.