Помогите Не работает MoonCases

Здравствуйте, не работает плагин mooncases не знаю из за чего. В консоле выдаёт такую ошибку
[10:49:37] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'cases' in plugin MoonCases v2.1
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[server.jar:git-Spigot-93e20b3-e8b6e4f]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[server.jar:git-Spigot-93e20b3-e8b6e4f]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:651) ~[server.jar:git-Spigot-93e20b3-e8b6e4f]
at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1392) [server.jar:git-Spigot-93e20b3-e8b6e4f]
at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1227) [server.jar:git-Spigot-93e20b3-e8b6e4f]
at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:45) [server.jar:git-Spigot-93e20b3-e8b6e4f]
at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:1) [server.jar:git-Spigot-93e20b3-e8b6e4f]
at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13) [server.jar:git-Spigot-93e20b3-e8b6e4f]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) [?:?]
at java.util.concurrent.FutureTask.run(FutureTask.java:264) [?:?]
at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) [server.jar:git-Spigot-93e20b3-e8b6e4f]
at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:748) [server.jar:git-Spigot-93e20b3-e8b6e4f]
at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406) [server.jar:git-Spigot-93e20b3-e8b6e4f]
at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679) [server.jar:git-Spigot-93e20b3-e8b6e4f]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577) [server.jar:git-Spigot-93e20b3-e8b6e4f]
at java.lang.Thread.run(Thread.java:836) [?:?]
Caused by: java.lang.NullPointerException
at L.1.L.1.s.L.L(Unknown Source) ~[?:?]
at java.lang.invoke.DirectHandle.invokeExact_thunkArchetype_L(DirectHandle.java:289) ~[?:?]
at L.1.L.1.onCommand(Unknown Source) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[server.jar:git-Spigot-93e20b3-e8b6e4f]
... 15 more

Помогите пожалуйста, заранее спасибо

 

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Используя слиты плагины ты подвергаешь опасности не только свой сервер, но и его игроков.