Problem z plikami serwerowymi - częste crashe w konsoli oraz crashe serwera.

[FIE23]

[19:04:45 ERROR]: Could not pass event PlayerInteractEvent to ChestProtect v2.5
org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:297) ~[craftbukkit-1.8.3.jar:git-Bukkit-7d0f836]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[craftbukkit-1.8.3.jar:git-Bukkit-7d0f836]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:501) [craftbukkit-1.8.3.jar:git-Bukkit-7d0f836]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:486) [craftbukkit-1.8.3.jar:git-Bukkit-7d0f836]
at org.bukkit.craftbukkit.v1_8_R2.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:209) [craftbukkit-1.8.3.jar:git-Bukkit-7d0f836]
at org.bukkit.craftbukkit.v1_8_R2.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:176) [craftbukkit-1.8.3.jar:git-Bukkit-7d0f836]
at org.bukkit.craftbukkit.v1_8_R2.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:172) [craftbukkit-1.8.3.jar:git-Bukkit-7d0f836]
at net.minecraft.server.v1_8_R2.PlayerConnection.a(PlayerConnection.java:1112) [craftbukkit-1.8.3.jar:git-Bukkit-7d0f836]
at net.minecraft.server.v1_8_R2.PacketPlayInArmAnimation.a(SourceFile:22) [craftbukkit-1.8.3.jar:git-Bukkit-7d0f836]
at net.minecraft.server.v1_8_R2.PacketPlayInArmAnimation.a(SourceFile:8) [craftbukkit-1.8.3.jar:git-Bukkit-7d0f836]
at net.minecraft.server.v1_8_R2.PlayerConnectionUtils$1.run(SourceFile:13) [craftbukkit-1.8.3.jar:git-Bukkit-7d0f836]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [?:1.7.0_71]
at java.util.concurrent.FutureTask.run(FutureTask.java:262) [?:1.7.0_71]
at net.minecraft.server.v1_8_R2.SystemUtils.a(SourceFile:60) [craftbukkit-1.8.3.jar:git-Bukkit-7d0f836]
at net.minecraft.server.v1_8_R2.MinecraftServer.A(MinecraftServer.java:670) [craftbukkit-1.8.3.jar:git-Bukkit-7d0f836]
at net.minecraft.server.v1_8_R2.DedicatedServer.A(DedicatedServer.java:336) [craftbukkit-1.8.3.jar:git-Bukkit-7d0f836]
at net.minecraft.server.v1_8_R2.MinecraftServer.z(MinecraftServer.java:626) [craftbukkit-1.8.3.jar:git-Bukkit-7d0f836]
at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java:534) [craftbukkit-1.8.3.jar:git-Bukkit-7d0f836]
at java.lang.Thread.run(Thread.java:745) [?:1.7.0_71]
Caused by: java.lang.NullPointerException
at com.gmail.jordz98.MyBlockListener.onInventoryOpenEvent(MyBlockListener.java:106) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_71]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[?:1.7.0_71]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_71]
at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_71]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:295) ~[craftbukkit-1.8.3.jar:git-Bukkit-7d0f836]
... 18 more

Co chwila spamuje takim "czymś" w konsoli, być może powoduje to częste crashe serwera, wie ktoś co może być powodem? Za pomoc nagradzam