Unable to activate Stylistic Set


I started using Glyphs recently and I want to add a new stylistic set. I followed your article on it (https://glyphsapp.com/tutorials/stylistic-sets) but for some reason, I can’t activate my .ss01. Sorry if it’s a silly one but would be great if someone can help.


That might have to do with the empty feature just above in the left sidebar.

Thank you for responding.
Just re-tried, don’t think so.

Do you have a glyph called “g.ss01” in your font?

No, that was it! Just pasted my design on other glyph and re-named.
All good now, thanks Georg!