I've been running all 3 mods on my main map for the longest time, and checking again with just these 3 mods and everything works fine.
Do you have any other mods, specifically any mods that might be affecting furnaces? You can check this in-game by loading a map without mini or micro machines, and hovering your mouse over the electric furnaces. It should say something like base > electric_furnaces > some_other_mod
Those lines in both mods are attempting to copy an electric furnace entity, and the error in question is "invalid prototype", meaning that the furnace either doesn't exist at all, or simply doesn't exist on the list of furnaces (which might happen if it was converted into an assembling machine prototype by another mod).
This could be Krastorio 2... since GotLag's Electric Furnaces has priority over Kras2 in my code, it would attempt to use the wrong copy settings and fail to copy. Or Fantario, for the same reason