OK. Here's the file:
Thank you!
(I'm guessing the recipe didn't get unlocked because I didn't have Eltio Leaf when I first obtain the flower. Just a guess, though...)
Alright, I've figured it out.
There's no Ring Flower to pick up anywhere. ( I must've missed this when I edited some Shell Flowers in).
I'll make a quick fix to include some!
I've added some in Green Valley and the Entrance of the Infested Cave.
And while I was at it included some more flowers for those who want to 100% the recipe/crafting items.