The supported discovery point for Big Ambitions mods is the Steam Workshop. Nexus Mods also has community files, but those installs and compatibility claims are third-party. [topic-1]

What to do

  • Match every mod to the current game version before subscribing or installing.
  • Read dependencies and load-order notes from the mod author.
  • Back up saves, test one mod at a time, and remove incompatible mods before reporting a game bug.

Why this answer holds

Steam lists Workshop support as an official feature, and the game's official site records Workshop integration in update 0.11. [steam]

Version 1.0 check

Hovgaard Games does not automatically verify every Workshop or Nexus file. Mod pages remain responsible for their own compatibility claims.