having problem exporting color font

I proceeded as this tutorial to make a color font.
Creating a layered color font
but I get “These glyphs are not compatible…Can’t convert to compatible TrueType curves.“
eventhough i added Enforce Compatibility Check custom parameter and unchecked it.

I should export from variable tabs. right? since i need one font file with all masters together.
some master is shadow and other one is body other one borders and … . I also have some emty masters in most of my glyphs.

should I do it with adding each as masters, as in the tutorial above? or as layers?
and also in doing with layers way I have a problem that the colors don’t work in illustraitor, but work fine in web and in inshot app.

Can you show the master/layer setup?

That error can also point to a problem with one specific path. So could you send me the file (in a private message)?