[12:58:12] [Server thread/ERROR]: Could not pass event PlayerDropItemEvent to InfoBook v1.3
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:305) ~[spigot.jar:git-Spigot-8a983f9-9ae3381]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-8a983f9-9ae3381]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot.jar:git-Spigot-8a983f9-9ae3381]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot.jar:git-Spigot-8a983f9-9ae3381]
	at net.minecraft.server.v1_8_R1.EntityHuman.a(EntityHuman.java:602) [spigot.jar:git-Spigot-8a983f9-9ae3381]
	at net.minecraft.server.v1_8_R1.EntityHuman.a(EntityHuman.java:555) [spigot.jar:git-Spigot-8a983f9-9ae3381]
	at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java:557) [spigot.jar:git-Spigot-8a983f9-9ae3381]
	at net.minecraft.server.v1_8_R1.PacketPlayInBlockDig.a(SourceFile:40) [spigot.jar:git-Spigot-8a983f9-9ae3381]
	at net.minecraft.server.v1_8_R1.PacketPlayInBlockDig.a(SourceFile:10) [spigot.jar:git-Spigot-8a983f9-9ae3381]
	at net.minecraft.server.v1_8_R1.PacketHandleTask.run(SourceFile:13) [spigot.jar:git-Spigot-8a983f9-9ae3381]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_25]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_25]
	at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:685) [spigot.jar:git-Spigot-8a983f9-9ae3381]
	at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:316) [spigot.jar:git-Spigot-8a983f9-9ae3381]
	at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:623) [spigot.jar:git-Spigot-8a983f9-9ae3381]
	at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:526) [spigot.jar:git-Spigot-8a983f9-9ae3381]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_25]
Caused by: java.lang.NullPointerException
	at me.infobook.InfoBook.onItemDrop(InfoBook.java:294) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor322.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_25]
	at java.lang.reflect.Method.invoke(Method.java:483) ~[?:1.8.0_25]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:301) ~[spigot.jar:git-Spigot-8a983f9-9ae3381]
	... 16 more