you just need to find an earased pixel or pixels and fill it.
like a earesed leg or something like that show me the skin and i will see what i can do to fix or help you to fix it
thats all

You have a pixel or more of your skin that is semi-transparent or completely transparent. Examine the skin and see if you can find it, then fix it. If you can't find it, an easy way to fix it is to save the skin in MS Paint, then open it in another program and erase the 'hat' that has been given to the skin. This will fix any transparent pixels because MS Paint doesn't support transparency and automatically forces all pixels to be opaque. Hopefully that makes sense.

I had this exact thing so I had to make another one unfortunately not unless you get a mod or someone to look at it