I get the following error when trying to run the game for the second time :(
λ java -jar GameOffJam-1.0.0.jar
Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: Failed to load DataAPI.BuildData(buildingType=SERVICES, level=1, buildingState=GOOD, serviceType=WATER, maxPopulation=0, happiness=0, entities=[])