Hey, with the new K2, the mod requires a small change.
in the data.lua the path needs to be changed for K2:
it should look like:
mod = "K2SETweaks",
icons = {
{ icon = "__Krastorio2Assets__/technologies/backgrounds/matter.png", icon_size = 128},
{ icon = "__space-exploration-graphics__/graphics/technology/"..tech_image..".png", icon_size = 128, scale = 0.5}
},