help Oraxen plugin

Hi everyone! I'm having an issue trying to add wings (Elytras) using the Oraxen plugin. I compiled the plugin from GitHub, but I'm running into some problems. I managed to open the wings, but they appear invisible or without the correct texture. I've already tried changing the material from 'kelp' to 'elytra' and adjusted other settings, but it still doesn't work. Any idea what might be wrong?

yggdrasil_animated-wings:
displayname: Display
material: KELP
Pack:
generate_model: false
model: elitecreatures/yggdrasil_animated/wings