Charakter Rig Arms not rendering?

What I have done is Copied the Zamination Minecraft Rig Into a Scene and deleted all that weird stuff came with it, but havent been seen in the Zamination Rig file, like these planes etc, but ofc took care not to delete the bones. I animated it and everything was working fine, till i wanted to render the animation where i noticed that everything was working fine, but the arms were just gone. If I click on them, and open the Charakter Rig main, there are like added, but the mesh in the layer editor is dark grey and cant be disabled (top right SS one). How can i make the arms visible?

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Here is the File: