NullPointerException

[erikzimmermann]

Had this error. Run the command "/pwi" the first time. Didn't use this plugin before...

org.bukkit.command.CommandException: Unhandled exception executing command 'pwi' in plugin PerWorldInventory v1.11.5 at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot.jar:git-Spigot-550ebace-7019900e] at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot.jar:git-Spigot-550ebace-7019900e] at org.bukkit.craftbukkit.v1_8_R1.CraftServer.dispatchCommand(CraftServer.java:646) ~[spigot.jar:git-Spigot-550ebace-7019900e] at net.minecraft.server.v1_8_R1.PlayerConnection.handleCommand(PlayerConnection.java:1115) [spigot.jar:git-Spigot-550ebace-7019900e] at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java:950) [spigot.jar:git-Spigot-550ebace-7019900e] at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(PacketPlayInChat.java:26) [spigot.jar:git-Spigot-550ebace-7019900e] at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(PacketPlayInChat.java:53) [spigot.jar:git-Spigot-550ebace-7019900e] at net.minecraft.server.v1_8_R1.PacketHandleTask.run(SourceFile:13) [spigot.jar:git-Spigot-550ebace-7019900e] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_151] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_151] at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:696) [spigot.jar:git-Spigot-550ebace-7019900e] at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:316) [spigot.jar:git-Spigot-550ebace-7019900e] at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:634) [spigot.jar:git-Spigot-550ebace-7019900e] at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:537) [spigot.jar:git-Spigot-550ebace-7019900e] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_151] Caused by: java.lang.NullPointerException at me.gnat008.perworldinventory.PerWorldInventory.onCommand(PerWorldInventory.java:277) ~[?:?] at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-550ebace-7019900e] ... 14 more