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java.lang.NullPointerException: 	at me.blackvein.quests.util.ItemUtil.getDisplayString(ItemUtil.java:168)	at me.blackvein.quests.prompts.CreateStagePrompt$DeliveryListPrompt.getPromptText(CreateStagePrompt.java:2058)	at org.bukkit.conversations.Conversation.outputNextPrompt(Conversation.java:291)	at org.bukkit.conversations.Conversation.acceptInput(Conversation.java:230)	at org.bukkit.craftbukkit.v1_8_R3.conversations.ConversationTracker.acceptConversationInput(ConversationTracker.java:58)	at org.bukkit.craftbukkit.v1_8_R3.entity.CraftPlayer.acceptConversationInput(CraftPlayer.java:1034)	at net.minecraft.server.v1_8_R3.PlayerConnection$5.evaluate(PlayerConnection.java:984)	at org.bukkit.craftbukkit.v1_8_R3.util.Waitable.run(Waitable.java:24)	at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:732)	at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:367)	at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:657)	at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:560)	at java.lang.Thread.run(Unknown Source)