Помогите an internal error occurred while attempting to perform this command

Выдает ошибку, когда пишу /warp, /warp list, /warp info и т.д.
Вот ошибка в консоли:
org.bukkit.command.CommandException: Unhandled exception executing command 'warp' in plugin MyWarp v2.0
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:641) ~[spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1385) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1220) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:45) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:1) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_45]
at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_45]
at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:747) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:405) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:678) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:576) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_45]
Caused by: java.lang.NullPointerException
at me.taylorkelly.mywarp.WarpPermissions.permission(WarpPermissions.java:52) ~[?:?]
at me.taylorkelly.mywarp.WarpPermissions.warp(WarpPermissions.java:74) ~[?:?]
at me.taylorkelly.mywarp.MyWarp.onCommand(MyWarp.java:372) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
... 15 more

 

1. Я не нашёл версии 2.0, последняя 2-ая только 2.6.5, и та на 1.7.*
2. Лог запуска пожалуйста.

 

а чего essentials не используешь?