So, I'm writing a patchouli book for Thermal Expansion along with others and for the contributers I was going to put their Minecraft skin but once you open the book, and click on the category where those are located the game instantly crashes.

Edit: Under Drullkus's request I added a copy of the json that was doing it

Log https://pastebin.com/F5cCGkSq

Versions:
Forge: 31.2.41
examplejson.zip

Patchoulli - 1.15.2- 1.2-35

what was the problem? User error still shouldn't crash the game so we're interested in shoring up error handling in modern versions

User Error (Thanks Drullkus)

Well, since you insist, the problem seemed to exist because when I copy pasted the base minecraft head getting command, I had kept an extra space before the whole line so it was " minecraft_head(ect ect)" And that caused it crashing beyond oblivion

Cool thanks