Describe the bug
When trying to generate a Nethercity (the kind in the lava, not the floating kinds), the area is cleared, the roads generate, then it crashes, then makes you unable to enter the world. Possibly related, but the chained cities don't generate either, but they don't seem to cause a crash. I did delete both the CQR folder and the cqrepoured file in the configs folder before generating this, as was instructed, but got this crash.

To Reproduce
Steps to reproduce the behavior:

1. Go to the Nether
2. Fly around a bit until you come across a Nethercity
3. Let it generate, the area will be cleared, then the roads will generate, then crash
4. You are no longer allowed to enter the world

Expected behavior
The full city generates like normal and the game doesn't crash

Screenshots
https://i.imgur.com/39tGAwf.png
Nethercity roads and cleared area, this was taken right before it crashed

https://i.imgur.com/QzqB8CG.png
Glitchy chains, unsure if related or if this is its own unrelated bug

Versions
Chocolate Quest Repoured: 1.12.2-1.11.1A
Forge: 14.23.5.2838
Minecraft: 1.12.2

Other
Crash report:
crash-2020-03-15_01.18.05-server.txt

Log file:
latest.log

Singleplayer/Multiplayer: SP
Other mods (that are necessary to produce the bug): n/a, just cqr
Other mods (that are also installed):
list.txt

Chains are not glitched, it generated a floating city farther down

Can't reproduce