It only works in Explorer Trail (Hero Precinct > Explore).
If you activate DMG Mutiplier or 1 Hit Kill + God Mode you may encounter error so just activate God Mode only then it's all good (I think.. So far..).
Is it possible to add Unli Speedup(1min, 5min, 1hr) or Unli Resources(Food, Wood, Metal, Gas)? @GNaFF