The mod Biter Factions NG (0.2.0) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event biter-factions-ng::on_tick (ID 0)
biter-factions-ng/control.lua:280: bad argument #2 of 2 to 'table_size' (table expected, got nil)
stack traceback:
[C]: in function 'table_size'
biter-factions-ng/control.lua:280: in function <biter-factions-ng/control.lua:140>

Thanks for reporting this. What other mods do you have installed? When did this trigger (e.g. during startup, any specific game play event)?

It happened randomly while playing on a Death world save, there was another message in chat when I started the world, something to do with "large table size, this may take awhile"?

My modlist has changed since I had this error and uninstalled the mod, here's my current mod-list.json:

{
"mods":
[

{
  "name": "base",
  "enabled": true
},

{
  "name": "elevated-rails",
  "enabled": true
},

{
  "name": "quality",
  "enabled": true
},

{
  "name": "space-age",
  "enabled": true
},

{
  "name": "Actual_Craft_Time_2",
  "enabled": true
},

{
  "name": "ArmouredBiters",
  "enabled": true
},

{
  "name": "atan-air-scrubbing",
  "enabled": true
},

{
  "name": "atan-crash-site",
  "enabled": true
},

{
  "name": "Atomic_Overhaul",
  "enabled": true
},

{
  "name": "biter-cleanup",
  "enabled": true
},

{
  "name": "blueprint-shotgun",
  "enabled": true
},

{
  "name": "Bottleneck",
  "enabled": true
},

{
  "name": "bullet-trails",
  "enabled": true
},

{
  "name": "calculator-ui",
  "enabled": true
},

{
  "name": "ch-concentrated-solar",
  "enabled": true
},

{
  "name": "ChangeInserterDropLane",
  "enabled": true
},

{
  "name": "CleanedConcrete",
  "enabled": true
},

{
  "name": "CleanFloor",
  "enabled": true
},

{
  "name": "colorui",
  "enabled": true
},

{
  "name": "data-utils",
  "enabled": true
},

{
  "name": "death-location",
  "enabled": true
},

{
  "name": "DiscoScience",
  "enabled": true
},

{
  "name": "Diversitree",
  "enabled": true
},

{
  "name": "eco-friendly-electric-machines",
  "enabled": true
},

{
  "name": "ElectricTrains",
  "enabled": true
},

{
  "name": "enemy-distance-scaling",
  "enabled": true
},

{
  "name": "even-distribution",
  "enabled": true
},

{
  "name": "extinguisher",
  "enabled": true
},

{
  "name": "factorio-crash-site",
  "enabled": true
},

{
  "name": "factoryplanner",
  "enabled": true
},

{
  "name": "FactorySearch",
  "enabled": true
},

{
  "name": "Fill4Me",
  "enabled": true
},

{
  "name": "fire-lights",
  "enabled": true
},

{
  "name": "flib",
  "enabled": true
},

{
  "name": "Flow Control",
  "enabled": true
},

{
  "name": "grappling-gun",
  "enabled": true
},

{
  "name": "Gun_Turret_Alerts",
  "enabled": true
},

{
  "name": "handcraft_timer_space_age",
  "enabled": true
},

{
  "name": "informatron",
  "enabled": true
},

{
  "name": "k2-wind-turbine-zars-fork",
  "enabled": true
},

{
  "name": "kry-crash-site-settings",
  "enabled": true
},

{
  "name": "kry_stdlib",
  "enabled": true
},

{
  "name": "KS_Power",
  "enabled": true
},

{
  "name": "KS_Power_Rebalancing",
  "enabled": true
},

{
  "name": "light-overhaul",
  "enabled": true
},

{
  "name": "Lumberyard",
  "enabled": true
},

{
  "name": "nuclear-scorch-decay",
  "enabled": true
},

{
  "name": "pollution-scaling",
  "enabled": true
},

{
  "name": "PollutionCombinator-JamieFork",
  "enabled": true
},

{
  "name": "quirkycat_base",
  "enabled": true
},

{
  "name": "quirkycat_boron",
  "enabled": true
},

{
  "name": "quirkycat_duranium",
  "enabled": true
},

{
  "name": "quirkycat_glass",
  "enabled": true
},

{
  "name": "quirkycat_machines",
  "enabled": true
},

{
  "name": "quirkycat_recycle",
  "enabled": true
},

{
  "name": "quirkycat_sludge",
  "enabled": true
},

{
  "name": "quirkycat_uranium-change",
  "enabled": true
},

{
  "name": "quirkycat_useful_wood",
  "enabled": true
},

{
  "name": "Qurikycat-Recycling-and-Atomic-overhual-compat",
  "enabled": true
},

{
  "name": "RecipeBook",
  "enabled": true
},

{
  "name": "Refoliant",
  "enabled": true
},

{
  "name": "Repair_Turret",
  "enabled": true
},

{
  "name": "reverse-factory",
  "enabled": true
},

{
  "name": "Satisfactory_OST",
  "enabled": true
},

{
  "name": "sen-weather",
  "enabled": true
},

{
  "name": "solar-appliances",
  "enabled": true
},

{
  "name": "solar-calc",
  "enabled": true
},

{
  "name": "solar-productivity",
  "enabled": true
},

{
  "name": "solidwaste-pollution-filter",
  "enabled": true
},

{
  "name": "speaker-signals-2",
  "enabled": true
},

{
  "name": "StatsGui",
  "enabled": true
},

{
  "name": "textplates",
  "enabled": true
},

{
  "name": "thermal-solar-power-lite",
  "enabled": true
},

{
  "name": "trash-slot",
  "enabled": true
},

{
  "name": "tree_collision",
  "enabled": true
},

{
  "name": "visible-planets",
  "enabled": true
},

{
  "name": "visible-pollutants",
  "enabled": true
},

{
  "name": "vtk-deep-core-mining",
  "enabled": true
},

{
  "name": "Warehousing",
  "enabled": true
},

{
  "name": "water-pumpjack",
  "enabled": true
},

{
  "name": "zen-garden",
  "enabled": true
}

]
}

Fixed, please test.