Latest Version of Quark (r1.5-136) has been released but appears to be damaged:
I am running forge 14.23.5.2796 (1.12.2)
ARL version: AutoRegLib-1.3-24

Crash Log: Click here
https://pastebin.com/f5pYvKRv ^

Also contains a mod list ^
I am loading into a singleplayer world. Does not wanna do anything besides crash.
This might be related to VanillaFix, but the only mod that appears to be causing issues is Quark as when I remove VanillaFix it still crashed my client.

Now uploading a full crash log of the client itself to hopefully help understanding;

https://pastebin.com/zrf8hJar

Fixed with 137. Also dupe of #1097