Error

[22:49:02 INFO]: Rincewind34 issued server command: /shop addshop Shop2 2
[22:49:02 WARN]: java.lang.NullPointerException
[22:49:02 WARN]: 	at net.thejourneyofaerion.shop.npc.NPC.<init>(NPC.java:43)
[22:49:02 WARN]: 	at net.thejourneyofaerion.shop.managers.NPCManager.addNPC(NPCManager.java:69)
[22:49:02 WARN]: 	at net.thejourneyofaerion.shop.commands.CommandShop.onCommand(CommandShop.java:89)
[22:49:02 WARN]: 	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
[22:49:02 WARN]: 	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141)
[22:49:02 WARN]: 	at org.bukkit.craftbukkit.v1_10_R1.CraftServer.dispatchCommand(CraftServer.java:647)
[22:49:02 WARN]: 	at net.minecraft.server.v1_10_R1.PlayerConnection.handleCommand(PlayerConnection.java:1358)
[22:49:02 WARN]: 	at net.minecraft.server.v1_10_R1.PlayerConnection.a(PlayerConnection.java:1193)
[22:49:02 WARN]: 	at net.minecraft.server.v1_10_R1.PacketPlayInChat.a(PacketPlayInChat.java:45)
[22:49:02 WARN]: 	at net.minecraft.server.v1_10_R1.PacketPlayInChat.a(PacketPlayInChat.java:1)
[22:49:02 WARN]: 	at net.minecraft.server.v1_10_R1.PlayerConnectionUtils$1.run(SourceFile:13)
[22:49:02 WARN]: 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[22:49:02 WARN]: 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[22:49:02 WARN]: 	at net.minecraft.server.v1_10_R1.SystemUtils.a(SourceFile:45)
[22:49:02 WARN]: 	at net.minecraft.server.v1_10_R1.MinecraftServer.D(MinecraftServer.java:732)
[22:49:02 WARN]: 	at net.minecraft.server.v1_10_R1.DedicatedServer.D(DedicatedServer.java:400)
[22:49:02 WARN]: 	at net.minecraft.server.v1_10_R1.MinecraftServer.C(MinecraftServer.java:668)
[22:49:02 WARN]: 	at net.minecraft.server.v1_10_R1.MinecraftServer.run(MinecraftServer.java:567)
[22:49:02 WARN]: 	at java.lang.Thread.run(Thread.java:745)