Error to calculate ROI activity with customized MRI headmodel

[Hydranhy]

Hello!

I attempt to run ROIconnect with customized headmodels based on some MRI T1 data.
But first I am trying things out with the sample data provided here:
https://eeglab.org/tutorials/09_source/Custom_head_model.html

After I follow the instruction and "Create a head model from an MRI", the "EEG.dipfit.hdmfile" workspace turns into a structure instead of a pathway string:

Once I try to run "pop_roi_activity.m", it keeps telling me that "argument "headmodel" must be a string".
Is that anything I did wrong? or is that the current version of ROIconnect does not support the calculation of ROI activity with customized headmodel?

Many thanks to whoever attends to my issue!
Hydra NG