[help] Weapon became invisible when I equipped it.

[icymiracle]

I was a new modder. Recently I came up with a problem when I use Spriter to create animations. I followed the tutorial below:

I created the "ground"-animation and the swappable build using Spriter. After compilation I entered the game, the spear became invisible. Whatever, the on-ground-animation seemed fine.

I contrast my lua file between other author's but found nothing different. So I think it might be something wrong in my zip animation. I can't deal with it, can you help me!

modinfo.lua

modmain.lua

swap_firespear.zip

exported.rar