I have the exact same bug. I removed a terraformer and got a ton of lua errors. now every time i load a save I get:
Error while running event Natural_Evolution_Buildings::on_tick (ID 0)
Natural_Evolution_Buildings/control.lua:143: attempt to call global 'ticker' (a nil value)
Edit:looks like its an issue with the artifact collectors and the terraformer being removed causing a crash is a separate bug. I simply toggled the mod off to prevent further crashes, toggled it back on, and now I guess I just wait for a fix because placing those items breaks the game.
