While I was testing the meltdown of my RBMK reactor (15x15), as soon as it melted down, my game immediately crashed. I cannot enter the chunks the reactor is loaded into.

Mod List:
SuperMartijn642's Core Lib
Security Craft 1.9.12
SCP Lockdown 1.12.2-2.4.2
Moving Elevators 1.4.10
SuperMartijns642's Config Lib 1.1.8
Online Picture Frame 1.5.0
Mouse Tweaks 2.10
Mixin Compat 1.1-1.12.2
JEI 4.16.1.301
Jade 0.1.0
Hwyla 1.8.26-B41
NTM Extended 2.0.2
Geckolib 3.0.31
ExtraUtils2 1.9.9
CreativeCore 1.10.71
Controlling 3.0.12.4
Chisels & Bits 14.33
Camera Mod 1.0.10
Bookshelf 2.3.590
Better Signs 1.0
Appleskin 1.0.14

Minecraft 1.12.2

crash-2025-10-12_03.35.25-server.txt