Mod name: More UPS, FPS
Link: https://mods.factorio.com/mod/ups-fps

Reason: More UPS, FPS Mod removes the corpses from the trains, and function "next" is provided with nil.

The mod Renai Transportation (1.2.8) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event RenaiTransportation::on_nth_tick(1)
RenaiTransportation/script/trains/on_tick.lua:404: bad argument #1 of 2 to 'next' (table expected, got nil)
stack traceback:
[C]: in function 'next'
RenaiTransportation/script/trains/on_tick.lua:404: in function 'handle_trains'
RenaiTransportation/script/event/on_tick.lua:7: in function <RenaiTransportation/script/event/on_tick.lua:5>