[06:57:18 ERROR]: Could not pass event InventoryClickEvent to BattleGrounds v1.0
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot.jar:git-Spigot-4af49dc-c5e9a16]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-4af49dc-c5e9a16]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot.jar:git-Spigot-4af49dc-c5e9a16]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot.jar:git-Spigot-4af49dc-c5e9a16]
        at net.minecraft.server.v1_9_R2.PlayerConnection.a(PlayerConnection.java:1851) [spigot.jar:git-Spigot-4af49dc-c5e9a16]
        at net.minecraft.server.v1_9_R2.PacketPlayInWindowClick.a(SourceFile:33) [spigot.jar:git-Spigot-4af49dc-c5e9a16]
        at net.minecraft.server.v1_9_R2.PacketPlayInWindowClick.a(SourceFile:10) [spigot.jar:git-Spigot-4af49dc-c5e9a16]
        at net.minecraft.server.v1_9_R2.PlayerConnectionUtils$1.run(SourceFile:13) [spigot.jar:git-Spigot-4af49dc-c5e9a16]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_172]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_172]
        at net.minecraft.server.v1_9_R2.SystemUtils.a(SourceFile:45) [spigot.jar:git-Spigot-4af49dc-c5e9a16]
        at net.minecraft.server.v1_9_R2.MinecraftServer.D(MinecraftServer.java:726) [spigot.jar:git-Spigot-4af49dc-c5e9a16]
        at net.minecraft.server.v1_9_R2.DedicatedServer.D(DedicatedServer.java:399) [spigot.jar:git-Spigot-4af49dc-c5e9a16]
        at net.minecraft.server.v1_9_R2.MinecraftServer.C(MinecraftServer.java:665) [spigot.jar:git-Spigot-4af49dc-c5e9a16]
        at net.minecraft.server.v1_9_R2.MinecraftServer.run(MinecraftServer.java:564) [spigot.jar:git-Spigot-4af49dc-c5e9a16]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_172]
Caused by: java.lang.NullPointerException
        at me.samuel81.battlegrounds.bungee.BungeeManager.onClickInInventory(BungeeManager.java:376) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_172]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_172]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_172]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_172]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot.jar:git-Spigot-4af49dc-c5e9a16]
        ... 15 more