[BUG] MultiNiftiMapsMasker reports are empty

[Remi-Gau]

Is there an existing issue for this?

• I have searched the existing issues

Operating system

• Linux
• Mac
• Windows

Operating system version

For example one of the following:

• Linux Ubuntu 22.04

Python version

• 3.12
• 3.11
• 3.10
• 3.9
• 3.8

nilearn version

dev

Expected behavior

to have non empty reports

Current behavior & error messages

This is what I got:

Steps and code to reproduce bug

from pathlib import Path
from nilearn import datasets
from nilearn.maskers import (
    MultiNiftiMapsMasker
)

REPORTS_DIR = Path().cwd()

difumo = datasets.fetch_atlas_difumo(
    dimension=64, resolution_mm=2, legacy_format=False
)

data = datasets.fetch_development_fmri(n_subjects=2)

masker = MultiNiftiMapsMasker(
    maps_img=difumo.maps,
    standardize="zscore_sample",
    standardize_confounds="zscore_sample",
    memory="nilearn_cache",
    n_jobs=2,
)

masker.fit()
report = masker.generate_report()
report.save_as_html(REPORTS_DIR / "multi_nifti_maps_masker_atlas.html")

_ = masker.fit_transform(data.func, confounds=data.confounds)
report = masker.generate_report()
report.save_as_html(REPORTS_DIR / "multi_nifti_maps_masker_fitted.html")

[bthirion]

Oops, indeed.