[00:02:21 ERROR]: Could not pass event InventoryClickEvent to GymManagement v1.6.2
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:330) ~[JavaPluginLoader$1.class:git-Cauldron-MCPC-Plus-1.7.10-1.1207.01.180]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[RegisteredListener.class:git-Cauldron-MCPC-Plus-1.7.10-1.1207.01.180]
        at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:30) ~[TimedRegisteredListener.class:git-Cauldron-MCPC-Plus-1.7.10-1.1207.01.180]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [SimplePluginManager.class:git-Cauldron-MCPC-Plus-1.7.10-1.1207.01.180]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [SimplePluginManager.class:git-Cauldron-MCPC-Plus-1.7.10-1.1207.01.180]
        at net.minecraft.network.NetHandlerPlayServer.func_147351_a(NetHandlerPlayServer.java:2034) [nh.class:?]
        at net.minecraft.network.play.client.C0EPacketClickWindow.func_148833_a(SourceFile:32) [ix.class:?]
        at net.minecraft.network.play.client.C0EPacketClickWindow.func_148833_a(SourceFile:10) [ix.class:?]
        at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:244) [ej.class:?]
        at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:173) [nc.class:?]
        at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:969) [MinecraftServer.class:?]
        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:422) [lt.class:?]
        at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:799) [MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:659) [MinecraftServer.class:?]
        at java.lang.Thread.run(Thread.java:744) [?:1.7.0_51]
Caused by: java.lang.IllegalArgumentException: CommandLine cannot be null
        at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[Validate.class:2.6]
        at org.bukkit.craftbukkit.v1_7_R4.CraftServer.dispatchCommand(CraftServer.java:715) ~[CraftServer.class:git-Cauldron-MCPC-Plus-1.7.10-1.1207.01.180]
        at org.bukkit.craftbukkit.v1_7_R4.entity.CraftPlayer.performCommand(CraftPlayer.java:272) ~[CraftPlayer.class:git-Cauldron-MCPC-Plus-1.7.10-1.1207.01.180]
        at us.hqgaming.gymmanagement.managers.MenuManager.onClick(MenuManager.java:120) ~[?:?]
        at sun.reflect.GeneratedMethodAccessor69.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_51]
        at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_51]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:328) ~[JavaPluginLoader$1.class:git-Cauldron-MCPC-Plus-1.7.10-1.1207.01.180]
        ... 14 more