[13:43:49 ERROR]: Could not pass event InventoryClickEvent to CopsAndRobbers v2.0
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot_server.jar:git-Spigot-d2856ae-8f0f4ed]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot_server.jar:git-Spigot-d2856ae-8f0f4ed]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot_server.jar:git-Spigot-d2856ae-8f0f4ed]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot_server.jar:git-Spigot-d2856ae-8f0f4ed]
        at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:1603) [spigot_server.jar:git-Spigot-d2856ae-8f0f4ed]
        at net.minecraft.server.v1_8_R3.PacketPlayInWindowClick.a(SourceFile:31) [spigot_server.jar:git-Spigot-d2856ae-8f0f4ed]
        at net.minecraft.server.v1_8_R3.PacketPlayInWindowClick.a(SourceFile:9) [spigot_server.jar:git-Spigot-d2856ae-8f0f4ed]
        at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [spigot_server.jar:git-Spigot-d2856ae-8f0f4ed]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_74]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_74]
        at net.minecraft.server.v1_8_R3.SystemUtils.a(SystemUtils.java:19) [spigot_server.jar:git-Spigot-d2856ae-8f0f4ed]
        at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:718) [spigot_server.jar:git-Spigot-d2856ae-8f0f4ed]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:367) [spigot_server.jar:git-Spigot-d2856ae-8f0f4ed]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:657) [spigot_server.jar:git-Spigot-d2856ae-8f0f4ed]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:560) [spigot_server.jar:git-Spigot-d2856ae-8f0f4ed]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_74]
Caused by: java.lang.NullPointerException
        at net.devoloution.game.copvote.CopVoteManager.getVotesOf(CopVoteManager.java:26) ~[?:?]
        at net.devoloution.game.copvote.CopVoteManager.vote(CopVoteManager.java:59) ~[?:?]
        at net.devoloution.game.copvote.CopVoteListener.onClick(CopVoteListener.java:47) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_74]
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_74]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_74]
        at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_74]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot_server.jar:git-Spigot-d2856ae-8f0f4ed]
        ... 15 more