Error message in exporting typeface

I’m trying to export my glyphs but i get this error message “Error: “Glyph “a” not in font.” in Feature ordn in line: 1”

What does it mean and how do i fix it?

Thanks

Go into Font Info > Features, then check your ordn feature. You can click Update if it is set to generate automatically.

Otherwise, why don’t you have the glyph a in your exporting font?

That error means that you don’t have a glyph with the name ‘a’ in your font.