geckolib armor problem (2023.3, 1.18.2)

I created my armor but I can't save the mod element. I press save, the button is clicked but the mod element is not saved, so I can't even create it. video is here : https://drive.google.com/file/d/1PUFo1Jt7WDfsA8WCyfbPIaY6cig2DOhg/view?usp=sharing , and my geckolib plugin: https://drive.google.com/file/d/1aPpg8SzgvQpKAaS7Bnq2NkNgjulbPE_K/view?usp=sharing