1.191 Error ModManager.cpp:1558: Impossible de charger le mod « TheArcFurnaceImp » : TheArcFurnaceImp/data-updates.lua:55: attempt to perform arithmetic on field 'amount' (a nil value)
stack traceback:
TheArcFurnaceImp/data-updates.lua:55: in function 'copy_recipe_data'
TheArcFurnaceImp/data-updates.lua:98: in function 'generate_arc_smelting_recipe'
TheArcFurnaceImp/data-updates.lua:107: in main chunk
1.192 Loading mod core 0.0.0 (data.lua)
1.279 Checksum for core: 1476961332
1.319 Error ModManager.cpp:1558: Error in assignID: recipe-category with name 'crafting' does not exist.

I can provide you the log file if you need.