org.bukkit.command.CommandException: Unhandled exception executing command 'mq' in plugin MangoQuest v1.7.8v1

	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot-1.11.2.jar:git-Spigot-d4f98a3-cb61ac0]

	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot-1.11.2.jar:git-Spigot-d4f98a3-cb61ac0]

	at org.bukkit.craftbukkit.v1_11_R1.CraftServer.dispatchCommand(CraftServer.java:650) ~[spigot-1.11.2.jar:git-Spigot-d4f98a3-cb61ac0]

	at net.minecraft.server.v1_11_R1.PlayerConnection.handleCommand(PlayerConnection.java:1344) [spigot-1.11.2.jar:git-Spigot-d4f98a3-cb61ac0]

	at net.minecraft.server.v1_11_R1.PlayerConnection.a(PlayerConnection.java:1179) [spigot-1.11.2.jar:git-Spigot-d4f98a3-cb61ac0]

	at net.minecraft.server.v1_11_R1.PacketPlayInChat.a(PacketPlayInChat.java:45) [spigot-1.11.2.jar:git-Spigot-d4f98a3-cb61ac0]

	at net.minecraft.server.v1_11_R1.PacketPlayInChat.a(PacketPlayInChat.java:1) [spigot-1.11.2.jar:git-Spigot-d4f98a3-cb61ac0]

	at net.minecraft.server.v1_11_R1.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-1.11.2.jar:git-Spigot-d4f98a3-cb61ac0]

	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_72]

	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_72]

	at net.minecraft.server.v1_11_R1.SystemUtils.a(SourceFile:46) [spigot-1.11.2.jar:git-Spigot-d4f98a3-cb61ac0]

	at net.minecraft.server.v1_11_R1.MinecraftServer.D(MinecraftServer.java:747) [spigot-1.11.2.jar:git-Spigot-d4f98a3-cb61ac0]

	at net.minecraft.server.v1_11_R1.DedicatedServer.D(DedicatedServer.java:399) [spigot-1.11.2.jar:git-Spigot-d4f98a3-cb61ac0]

	at net.minecraft.server.v1_11_R1.MinecraftServer.C(MinecraftServer.java:678) [spigot-1.11.2.jar:git-Spigot-d4f98a3-cb61ac0]

	at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:576) [spigot-1.11.2.jar:git-Spigot-d4f98a3-cb61ac0]

	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_72]

Caused by: java.lang.NullPointerException

	at me.Cutiemango.MangoQuest.data.QuestPlayerData.meetFriendPointReq(QuestPlayerData.java:251) ~[?:?]

	at me.Cutiemango.MangoQuest.manager.QuestBookGUIManager.openChoice(QuestBookGUIManager.java:155) ~[?:?]

	at me.Cutiemango.MangoQuest.commands.ConversationCommand.execute(ConversationCommand.java:57) ~[?:?]

	at me.Cutiemango.MangoQuest.commands.CommandReceiver.onCommand(CommandReceiver.java:28) ~[?:?]

	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot-1.11.2.jar:git-Spigot-d4f98a3-cb61ac0]

	... 15 more