Exporting variable font with weight axis.
This issue came up after adding several alternate layers [wght > 800]
Ok found the problem.
I had a bracket layer for question mark, that rolled its way into .notdef
And probably that’s how the automatic rlig code surprisingly ran into a glyph name that started with “.”
Decompose and letting go of the alternate layer in .notdef solved it.
I have the same error message but can’t find the problem. Any way of seing what is written in the rlig feature?
Look at your bracket layers. Something wrong with those.