Minecraft version:

1.12.2

Betweenlands version:

3.5.10-universal

Forge version:

1.12-forge-14.23.5.2854

Singleplayer or Multiplayer:

Singleplayer

Installed mods:

Sevtech Ages of the Sky modpack - https://www.curseforge.com/minecraft/modpacks/sevtech-ages-of-the-sky
with Optifine 1.12.2_HD_U_F5

Link to full crash log

https://pastebin.com/JZD49nNx

Description of the problem

How to reproduce:

1. Boot up the game with the aforementioned mods installed/active
2. Play the game normally for roughly 5-10 minutes, within sight of the original portal tree
3. With no consistently perceivable trigger on my end, the game will crash to desktop.

Expected result:

Being able to explore the initial area of the Between lands and start getting into the mod for fun and profit.

Actual result:

Game crashes after a short period of play.

Pictures:

n/a

This crash seems to be caused by Astral Sorcery, please report it there, thanks!

Hmm ok I will ask them as well then.