Iolite/Cerulean/Vermillion Coffin Crafts Not Working

After not being able to craft a Vermilion ring in the graveyard I got two coffins for a Iolite ring just to see if that one would work. The corpses were "Ancient Archer" i83 Undead and "Ancient Archer" i83 Undead for the Iolite ring and "Spectral Corsair" i83 Undead and "Spectral Corsair" i83 Undead for the Vermilion ring. The two crafts are on opposite sides of the graveyards. The vermilion ring is two graves spaced one apart and I can't place something in between. The Iolite ring one is in the ground, and one is still in my inventory.

Same Problem here.