I didnt copy the Error Code but it was something similar to
failed to load properly tried to index field '?' ( a nil value )
beltlayer/prototypes/items.lua 16
beltlayer/prototypes/items.lua 36
required in beltlayer data-updates lua 3
Seeing as Modmash Splinter Them is a very complex mod I dont expect anyone to fix this.
A conflict note would be great to save others the tedious work of disabling/enabling mods until you find out which one causes the problems
