How to use TotalSegmentator from Script with "--no-main-window" option

[pieper (Steve Pieper (Isomics, Inc.))]

This thread should help:

Python script crashes when running w/o GUI due to smoothing effect

I try to run a python script via the command ./Slicer --no-splash --no-main-window --python-script ‘customScript.py’. It crashes when executing the following line: segmentEditorWidget.setActiveEffectByName("Smoothing"), however, it works when I remove the flag --no-main-window and also when the same code is run via a Jupyter Notebook. Is there any way to apply smoothing effect w/o a GUI? Slicer version: 5.2.2 Thanks!