Custom Accessory Problem

I’ve been trying to make a custom Accessory


Xnip2025-03-10_16-50-07

but this keeps happening:
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I’ve searched everywhere and many other people have the same issue but I have’t seen any solutions.

Edit: I found the solution, turns out “WrapLayer” was an actual object thing I had to put in the meshpart. But i’m having another issue, when I try to use the Accessory Fitting Tool and I select the meshpart, this happens:

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I’m not sure as to why this is happening, if you know of a solution please let me know, thanks.

Edit 2: It worked, but I had to delete the WrapLayer first. Weird.