[06:05:21] [Async Chat Thread - #0/ERROR]: Could not pass event AsyncPlayerChatEvent to SimplePrefix v2.3.3
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:299) ~[minecraft_server.jar:git-Spigot-1591]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[minecraft_server.jar:git-Spigot-1591]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [minecraft_server.jar:git-Spigot-1591]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:484) [minecraft_server.jar:git-Spigot-1591]
	at net.minecraft.server.v1_7_R4.PlayerConnection.chat(PlayerConnection.java:935) [minecraft_server.jar:git-Spigot-1591]
	at net.minecraft.server.v1_7_R4.PlayerConnection.a(PlayerConnection.java:875) [minecraft_server.jar:git-Spigot-1591]
	at net.minecraft.server.v1_7_R4.PacketPlayInChat.a(PacketPlayInChat.java:28) [minecraft_server.jar:git-Spigot-1591]
	at net.minecraft.server.v1_7_R4.PacketPlayInChat$1.run(PacketPlayInChat.java:59) [minecraft_server.jar:git-Spigot-1591]
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.7.0_25]
	at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source) [?:1.7.0_25]
	at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.7.0_25]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.7.0_25]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.7.0_25]
	at java.lang.Thread.run(Unknown Source) [?:1.7.0_25]
Caused by: java.util.UnknownFormatConversionException: Conversion = ' '
	at org.bukkit.event.player.AsyncPlayerChatEvent.setFormat(AsyncPlayerChatEvent.java:100) ~[minecraft_server.jar:git-Spigot-1591]
	at com.flabaliki.simpleprefix.SimplePrefix.onPlayerChat(SimplePrefix.java:104) ~[?:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_25]
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_25]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_25]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_25]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:296) ~[minecraft_server.jar:git-Spigot-1591]
	... 13 more