How to add an accessory option to the selection wheel in Minecraft

[SENNA_SOURCE]

Hello, I have a question. I've reworked the model to suit my needs, including textures and the model itself and everything. How do I add an accessory that can be removed if necessary? Like in the first screenshot as an example. And if I add a folder with a cube through Blockbench (as an example), I get this error in the chat. I can share the Lua code. I'm a complete noob. And I apologize for the translator if they translated anything incorrectly. Thanks in advance.

[CheeseyCake9238]

11 hours ago, SENNA_SOURCE said:

Hello, I have a question. I've reworked the model to suit my needs, including textures and the model itself and everything. How do I add an accessory that can be removed if necessary? Like in the first screenshot as an example. And if I add a folder with a cube through Blockbench (as an example), I get this error in the chat. I can share the Lua code. I'm a complete noob. And I apologize for the translator if they translated anything incorrectly. Thanks in advance.

It's specifically a problem with this avatar, I didn't exactly set it up to be extendable. 
If you change addKeybinds from true to false at the top of the script.lua file then it should stop erroring

Edited September 22, 2025 by CheeseyCake9238