I'm trying to play Sky Odyssey with my friends and I went and updated all the mods and now I'm getting this crash:
https://pastebin.com/W72kYyz0
Seems like it has something to do with ae2. Is there some custom recipe thats breaking it?

Since 1.12.2 is old news I don't expect any updates to fix this or anything but maybe just help as to maybe a version to go back to or just some pointers as to what to do to fix it.

Minecraft 1.12.2
forge-14.23.5.2847

EDIT: disabled ae2 quarts + grinder recipes in the compat file and it works. should have looked first. you can just delete this issue cause its really just a waste of time.