My game crash when I try to load a custom skin

Every time that I try to load a custom skin make on https://www.minecraftskins.com/skin-editor/ my game crashed and the skin isn't there when I launch the game again. It's a bit disappointing. I try out with slim or not slim skin, both don't work (I put them in attatchement). The skins which are in the game packs all work. 

I hope that you will find out the probleme.