hey there, your mod piqued my interest to add the r1.8+ Alex skin model, but attempting to install it to the Mango Pack, it crashes on startup

here's what MultiMC had to say

a look at my Java arguments

and here's a look at the .minecraft folder, with ears.jar highlighted

Mango Pack is a modpack for beta 1.7.3, just like Better Than Adventure is
https://www.youtube.com/watch?v=CHlhDgXQkG0

if more resources are needed, please guide me on how to get them

is this out of scope?

nevermind, reading comprehension is hard - i was supposed to use the vanilla b1.7.3 version, not the fabric one... oops