It says
"Failed to load mods: Error in assignID, item with name 'tinned-copper-cable' does not exist.
Source: deadlock-unpackrecipe-tinned-copper-cable(recipe)."
Hm, looking at the deps of that, it's possible that it removes tinned copper cable after this adds the stacking recipe. I can try making it an optional dep (so the stacking happens after the removal), that may help, but you'd have to test it. Give me a minute and try it out?