[13:08:52 ERROR]: Error handling conversation prompt
java.lang.NullPointerException: null key in entry: null=1
        at com.google.common.collect.CollectPreconditions.checkEntryNotNull(CollectPreconditions.java:31) ~[BlockSurvi1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at com.google.common.collect.SingletonImmutableBiMap.<init>(SingletonImmutableBiMap.java:39) ~[BlockSurvi1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at com.google.common.collect.ImmutableBiMap.of(ImmutableBiMap.java:57) ~[BlockSurvi1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at com.google.common.collect.ImmutableMap.of(ImmutableMap.java:80) ~[BlockSurvi1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at com.google.common.collect.ImmutableMap.copyOf(ImmutableMap.java:292) ~[BlockSurvi1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at org.bukkit.craftbukkit.v1_9_R2.inventory.CraftMetaItem.getEnchants(CraftMetaItem.java:675) ~[BlockSurvi1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at org.bukkit.inventory.ItemStack.getEnchantments(ItemStack.java:399) ~[BlockSurvi1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at me.blackvein.quests.util.ItemUtil.serializeItemStack(ItemUtil.java:300) ~[Quests-3.4.8.jar:?]
        at me.blackvein.quests.QuestFactory.saveQuest(QuestFactory.java:834) ~[Quests-3.4.8.jar:?]
        at me.blackvein.quests.QuestFactory$SavePrompt.acceptInput(QuestFactory.java:668) ~[Quests-3.4.8.jar:?]
        at org.bukkit.conversations.Conversation.acceptInput(Conversation.java:229) [BlockSurvi1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at org.bukkit.craftbukkit.v1_9_R2.conversations.ConversationTracker.acceptConversationInput(ConversationTracker.java:58) [BlockSurvi1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at org.bukkit.craftbukkit.v1_9_R2.entity.CraftPlayer.acceptConversationInput(CraftPlayer.java:1029) [BlockSurvi1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at net.minecraft.server.v1_9_R2.PlayerConnection$5.evaluate(PlayerConnection.java:1198) [BlockSurvi1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at org.bukkit.craftbukkit.v1_9_R2.util.Waitable.run(Waitable.java:24) [BlockSurvi1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at net.minecraft.server.v1_9_R2.MinecraftServer.D(MinecraftServer.java:740) [BlockSurvi1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at net.minecraft.server.v1_9_R2.DedicatedServer.D(DedicatedServer.java:399) [BlockSurvi1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at net.minecraft.server.v1_9_R2.MinecraftServer.C(MinecraftServer.java:665) [BlockSurvi1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at net.minecraft.server.v1_9_R2.MinecraftServer.run(MinecraftServer.java:564) [BlockSurvi1.9.4.jar:git-Spigot-c6871e2-0cd0397]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_191]