The Gold Edition (specifically the Venice expansion) contains a dormant anti-cheat system often referred to as . If Cheat Engine is attached to the process without mitigation, the game may detect memory scanning and trigger a crash or an "Unauthorized Function" error.
file in CE and click the boxes next to the cheats you want to enable. Alternative: Trainers Anno 1404 Gold Edition Cheat Engine
Most community-created tables on platforms like FearLess Revolution or Cheat Engine Forums provide the following scripts: Anno 1404 Gold Edition Cheat Engine