I was making a game, and when landing on a SE mod planet, I had problems with the nuclear biters that weren't letting me move. I would die instantly landing on the planet... so I decided to deactivate only the nuclear biters... that's right. As soon as I landed on the planet, I walked a little on the surface, I received this error message:

The mod Rampant (3.3.4) caused a non-recoverable error.
Please report this error to the mod author.
Error while running event Rampant::on_tick (ID 0)
Rampant, /libs/BaseUtils.lua：238： attempt to index field 71 (a nil value) stack traceback：
Rampant, /libs/BaseUtils.lua：238： in function
<Rampant/libs/BaseUtils.lua：232>
(...tail calls...)

_ Rampant, /libs/BaseUtils.lua：451 ： in function 'queueUpgrade'
Rampant, /libs/BaseUtils.lua：700： in function 'processBaseMutation'
Rampant, /libs/Processor.lua：417： in function 'processNests' Rampant/control.lua：1O11: in function
<Rampant/control.lua：969>

Hi there - I am playing K2 (not with SE), and I wanted to remove a faction. Did the the /remove faction command for poison faction, but now I am getting the following at seemingly random times (not consistent crash), similar error?

The mod Rampant (3.3.4) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Rampant::on_tick (ID 0)
Rampant/libs/BaseUtils.lua:238: attempt to index field '?' (a nil value)
stack traceback:
Rampant/libs/BaseUtils.lua:238: in function <Rampant/libs/BaseUtils.lua:232>
(...tail calls...)
Rampant/libs/BaseUtils.lua:451: in function 'queueUpgrade'
Rampant/libs/BaseUtils.lua:700: in function 'processBaseMutation'
Rampant/libs/Processor.lua:417: in function 'processNests'
Rampant/control.lua:1011: in function <Rampant/control.lua:969>

I am also getting the same error as superstylin roughly once every half hour with K2SE after using /rampantRemoveFaction energy-thief and disabling sappers. I already successfully removed Wasp, Spawner, Electric, Laser, and Poison biters successfully mid-run, but Sappers did not remove correctly. Most of those were removed on a previous version, I believe only Laser biters were removed on the current version.

Actually, even reloading the save with the biters still enabled does not solve the problem. As best as I can tell, running the command corrupted the save, only removing Rampant entirely can prevent it from crashing. I also tried the /rampantRemoveNewEnemies to remove all of them, with no success. Here is one of the corrupted save files: https://drive.google.com/file/d/1ZAeUUE6wkQ72nc-D35OBW-LgkN2gZVRh/view?usp=drive_link

Reinstalling Rampant after uninstalling it seems to have fixed the crashes.