Downloading file 'hf_sef_evoked.tar.gz' from 'https://zenodo.org/record/3523071/files/hf_sef_evoked.tar.gz' to '/home/circleci/mne_data'.
100%|███████████████████████████████████████| 766M/766M [00:00<00:00, 3.35TB/s]
Extracting 'hf_sef/MEG' from '/home/circleci/mne_data/hf_sef_evoked.tar.gz' to '/home/circleci/mne_data'
Traceback (most recent call last):
  File "/home/circleci/.local/lib/python3.8/site-packages/pooch/processors.py", line 219, in _extract_file
    output.write(data_file.read())
AttributeError: 'NoneType' object has no attribute 'read'

$ python -c "import mne; mne.datasets.hf_sef.data_path(force_update=True, verbose=True)"
Using default location ~/mne_data for HF_SEF...
Downloading file 'hf_sef_evoked.tar.gz' from 'https://zenodo.org/record/3523071/files/hf_sef_evoked.tar.gz' to '/Users/larsoner/mne_data'.
100%|███████████████████████████████████████| 766M/766M [00:00<00:00, 1.79TB/s]
Extracting 'hf_sef/MEG' from '/Users/larsoner/mne_data/hf_sef_evoked.tar.gz' to '/Users/larsoner/mne_data'
Traceback (most recent call last):
  File "/Users/larsoner/opt/miniconda3/lib/python3.8/site-packages/pooch/processors.py", line 219, in _extract_file
    output.write(data_file.read())
AttributeError: 'NoneType' object has no attribute 'read'