Editing Openai/696e303b-9f9c-8001-b1df-6fcfc3f35a2c (section)

==== This line is the root cause again: ====

GenAdj.OccupiedRect(Thing t) → Thing t == null
inside
VFEInsectoids.InsectMapGenDef.DoMapGen

Everything after that is collateral damage.

Here’s the sequence in plain terms:
# You try to generate or enter a map (world site, quest, whatever).
# VFE Insectoids runs its map-generation hook.
# It tries to spawn hive surroundings.
# One of the Things it expects to exist does not (thanks to removed mods / missing defs).
# Map generation partially completes, then crashes.
# RimWorld now has a half-born map.
# The engine tries to clean up.
# Cleanup itself crashes because the map is internally inconsistent.
# Fog of war, sections, drawers — all try to read arrays that were never initialized.
# Every object on the map errors because the map itself is invalid.

That’s why you’re seeing:
* MapDrawer.Dispose() crashing
* Fog of War exploding
* Errors “for every single object”

This is not many bugs.
This is one bug poisoning the entire map lifecycle.