I don't know what causes the error but there are a lot of them.

function: AfterObjectRemoved -- file: StaleWaterAndPropane42.lua line # 229 | MOD: Stale Water and Propane
function: Add -- file: StaleWaterAndPropane42.lua line # 275 | MOD: Stale Water and Propane.
[03-01-25 15:52:26.904] ERROR: General f:140235, t:1735905146904> ExceptionLogger.logException> Exception thrown
java.lang.RuntimeException: attempted index: getProperties of non-table: null at KahluaThread.tableget(KahluaThread.java:1667).
Stack trace:
se.krka.kahlua.vm.KahluaThread.tableget(KahluaThread.java:1667)
se.krka.kahlua.vm.KahluaThread.luaMainloop(KahluaThread.java:624)
se.krka.kahlua.vm.KahluaThread.call(KahluaThread.java:173)
se.krka.kahlua.vm.KahluaThread.pcall(KahluaThread.java:1963)
se.krka.kahlua.vm.KahluaThread.pcallvoid(KahluaThread.java:1790)
se.krka.kahlua.integration.LuaCaller.pcallvoid(LuaCaller.java:66)
se.krka.kahlua.integration.LuaCaller.protectedCallVoid(LuaCaller.java:139)
zombie.Lua.Event.trigger(Event.java:81)
zombie.Lua.LuaEventManager.triggerEvent(LuaEventManager.java:315)
zombie.gameStates.IngameState.onTick(IngameState.java:1893)
zombie.GameProfiler.invokeAndMeasure(GameProfiler.java:195)
zombie.gameStates.IngameState.updateInternal(IngameState.java:1777)
zombie.gameStates.IngameState.update(IngameState.java:1443)
zombie.gameStates.GameStateMachine.update(GameStateMachine.java:101)
zombie.GameWindow.logic(GameWindow.java:372)