So I've been trying to download some mob skins (ex: https://www.planetminecraft.com/mob-skin/piebald-axolotl-5660205/) and convert them to a .mcpack file, and it'll start importing and then say that it failed to import it. If i click on the message for more details, most of the information for it is marked as unknown** or is simply empty. I'm not sure what i'm doing wrong here, or how i can fix this. Anyone got any suggestions?

**photo of the pack details