Hi Alfonso,
I did what you suggested. I found every subjects has their regressors, but this time only 14 subjects show size of 205, which is inconsistent with their original regressor.csv from fmriprep (200). The rest of 137 subjects are fine. I have not find ways to upload the conn_*.mat since it was 83mb, and attached the 14 subjects's original regressor.csv here.

Thanks
Hongru