Error SkyWars

[12:02:44] [Server thread/ERROR]: Could not pass event PlayerInteractEvent to SkyWars v1.8.2
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[server.jar:git-PaperSpigot-"4c7641d"]
    at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:78) ~[server.jar:git-PaperSpigot-"4c7641d"]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[server.jar:git-PaperSpigot-"4c7641d"]
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:517) [server.jar:git-PaperSpigot-"4c7641d"]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:502) [server.jar:git-PaperSpigot-"4c7641d"]
    at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:228) [server.jar:git-PaperSpigot-"4c7641d"]
    at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:195) [server.jar:git-PaperSpigot-"4c7641d"]
    at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:191) [server.jar:git-PaperSpigot-"4c7641d"]
    at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:721) [server.jar:git-PaperSpigot-"4c7641d"]
    at net.minecraft.server.v1_8_R3.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:52) [server.jar:git-PaperSpigot-"4c7641d"]
    at net.minecraft.server.v1_8_R3.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:1) [server.jar:git-PaperSpigot-"4c7641d"]
    at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [server.jar:git-PaperSpigot-"4c7641d"]
    at java.util.concurrent.Executors$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_R3.SystemUtils.a(SourceFile:44) [server.jar:git-PaperSpigot-"4c7641d"]
    at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:774) [server.jar:git-PaperSpigot-"4c7641d"]
    at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:378) [server.jar:git-PaperSpigot-"4c7641d"]
    at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:713) [server.jar:git-PaperSpigot-"4c7641d"]
    at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:616) [server.jar:git-PaperSpigot-"4c7641d"]
    at java.lang.Thread.run(Thread.java:748) [?:1.8.0_151]
Caused by: java.lang.NullPointerException
    at ak.CookLoco.SkyWars.listener.InteractListener.onInteract(InteractListener.java:128) ~[?:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_151]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_151]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_151]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_151]
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:300) ~[server.jar:git-PaperSpigot-"4c7641d"]
    ... 19 more