I'm using version 2017.1.0f3
The files are:
skin.atlas.txt
skin.json
skin.png
I don't understand because the older version was working perfectly.
Thanks in advance.
I believe I figured it out. Apparently if there is a png that is completely or very close to being empty, it gives me an error. I had to make certain layers empty because certain skins had different sorting. I just left 1 pixel of 3% opacity and that did the trick.