Polish Oats distribution error

attempted index: items of non-table: null
function: MSAOatsLootDistributions.lua -- file: MSAOatsLootDistributions.lua line # 9 | MOD: Polish Oats
java.lang.RuntimeException: attempted index: items of non-table: null
    at se.krka.kahlua.vm.KahluaThread.tableget(KahluaThread.java:1689)
    at se.krka.kahlua.vm.KahluaThread.luaMainloop(KahluaThread.java:492)
    at se.krka.kahlua.vm.KahluaThread.call(KahluaThread.java:163)
    at se.krka.kahlua.vm.KahluaThread.pcall(KahluaThread.java:1980)
    at se.krka.kahlua.vm.KahluaThread.pcall(KahluaThread.java:1782)
    at se.krka.kahlua.integration.LuaCaller.pcall(LuaCaller.java:76)
    at se.krka.kahlua.integration.LuaCaller.protectedCall(LuaCaller.java:117)
    at zombie.Lua.LuaManager.RunLuaInternal(LuaManager.java:564)
    at zombie.Lua.LuaManager.RunLua(LuaManager.java:510)
    at zombie.Lua.LuaManager.RunLua(LuaManager.java:496)
    at zombie.Lua.LuaManager.LoadDirBase(LuaManager.java:342)
    at zombie.Lua.LuaManager.LoadDirBase(LuaManager.java:264)
    at zombie.gameStates.GameLoadingState.enter(GameLoadingState.java:97)
    at zombie.gameStates.GameStateMachine.update(GameStateMachine.java:145)
    at zombie.GameWindow.logic(GameWindow.java:298)
    at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:71)
    at zombie.GameWindow.frameStep(GameWindow.java:765)
    at zombie.GameWindow.run_ez(GameWindow.java:667)
    at zombie.GameWindow.mainThread(GameWindow.java:495)
    at java.base/java.lang.Thread.run(Unknown Source)