hey so um factorio is saying there was an error loading mods, i hate coding with a passion so im just gonna copypaste the error logs and let you figure it out

Failed to load mods: ...ransportation__/prototypes/TrainGoBrrrr/PayloadWagon.lua:17: attempt to index field '?' (a nil value)
stack traceback:
...ransportation__/prototypes/TrainGoBrrrr/PayloadWagon.lua:17: in main chunk
[C]: in function 'require'
RenaiTransportation/data.lua:22: in main chunk

if it helps i have ahem a few mods installed, but no space age dlc
kip can you fix soon pls i wanna chuck landmines at biters again :((((((((((((

That's interesting, do any of the mods you're using change cargo wagons at all? I think I already know the workaround but it'd be good to test with the mod just to be sure

closest i can think of is maybe cargo ships or factorio+, but other than that nothing that even touches trains, and even then those mods dont touch cargo wagons specifically (to my knowledge)

Show the modlist, im with the same problem, ill see if the problem is the same to me, temporary fix is use version 2.0.12

my modlist is as follows:

Todo List
AAI Programmable Vehicles
AAI Signals
AAI Vehicles: Warden
Atomic Artillery Reborn
Bullet Trails
Cargo Ships
Cargo Ship Graphics
Companion Drones 2.0
Configurable Valves
Customizable magazine size
Easy Void
Even Distribution
Factorio Library
Factorio+
Factorissimo 3
IndustrialCraft - Reinforced Walls
InformaTron
Jetpack
King Jo's Fuels
King Jo's Leopard 2A6
King Jo's Metal Gear Solid Ray
King Jo's Metal Gear Solid Rex
King Jo's Vehicle Master
Lex's Aircraft
Rate Calculator
Renai Transportation (duh)
Squeak Through 2

i dont exactly know how to use prior versions of a mod, but that's nothing a little googling can't fix, thanks for the advice

https://mods.factorio.com/mod/RenaiTransportation/downloads

Older packages is here

If possible use the factorio prototype explorer GUI shortcut

Mouse over then cargo wagon item inside your inventory and press Crtl + Shift + F

In the screen that pops look for prototype-history
It must say size: 1 or 2
click on the button beside the size info and it will say which mods affect the cargo wagon
Answer here the mods inside the "size" info

Mine is:
Base 2.0.28
better-train-system 2.0.2
SchallTransportGroup 2.0.2
better-train-system 2.0.2 (again)
5dim_core 2.0.38
RenaiTransportation 2.0.12

@kiplacon save us

Cool I'll test with those mods. 5dim seems the most likely to be causing the change but you never know lol. Should have a fix later today

Mouse over then cargo wagon item inside your inventory and press Crtl + Shift + F

Actually in this case I'd need that same info but for the actual wagon in game, not the item. The list still helps though

Oh forgot about the entity...

base
kry-vehicles-grid 2.1.11
ups-fps 0.4.0
combat-mechanics-overhaul 0.7.2

Guess what it actually wasn't any of the mods, I added a graphic fix for the payload and impact wagon when they go up elevated rails, but if you don't have the expansion installed then you wouldn't have the elevated rails and thus you wouldn't have the graphic that needs fixing and thus it would crash lmao. Should be good in 2.0.14

excellent; time to throw more landmines at biters

🥏💣🐜💥