[08:35:47 WARN]: [MultiInv] Task #3827 for MultiInv v3.3.2-dev generated an exception
java.lang.IllegalArgumentException: Item cannot be null
        at org.apache.commons.lang.Validate.noNullElements(Validate.java:364) ~[spigot-1.8.jar:git-Spigot-ed3e3af-ee6d0fa]
        at org.bukkit.craftbukkit.v1_8_R1.inventory.CraftInventory.addItem(CraftInventory.java:267) ~[spigot-1.8.jar:git-Spigot-ed3e3af-ee6d0fa]
        at Tux2.TuxTwoLib.TuxTwoInventoryPlayer.addItem(TuxTwoInventoryPlayer.java:61) ~[?:?]
        at uk.co.tggl.pluckerpluck.multiinv.player.MIPlayerGiveCache.ExecuteStoredInventoryChanges(MIPlayerGiveCache.java:60) ~[?:?]
        at uk.co.tggl.pluckerpluck.multiinv.player.DeferredWorldCheck.run(DeferredWorldCheck.java:58) ~[?:?]
        at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot-1.8.jar:git-Spigot-ed3e3af-ee6d0fa]
        at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [spigot-1.8.jar:git-Spigot-ed3e3af-ee6d0fa]
        at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:709) [spigot-1.8.jar:git-Spigot-ed3e3af-ee6d0fa]
        at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:316) [spigot-1.8.jar:git-Spigot-ed3e3af-ee6d0fa]
        at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:634) [spigot-1.8.jar:git-Spigot-ed3e3af-ee6d0fa]
        at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:537) [spigot-1.8.jar:git-Spigot-ed3e3af-ee6d0fa]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_40]