11:43:40 [WARNING] [ProtocolLib] Task #2 for ProtocolLib v2.4.2-SNAPSHOT generated an exception
java.lang.UnsupportedOperationException: The method isOnline is not supported for temporary players.
	at com.comphenix.protocol.injector.server.TemporaryPlayerFactory$1.intercept(TemporaryPlayerFactory.java:140)
	at com.comphenix.protocol.injector.server.InjectorContainer$$EnhancerByCGLIB$$b9abb9a.isOnline(<generated>)
	at com.comphenix.protocol.async.PacketSendingQueue.isOnline(PacketSendingQueue.java:240)
	at com.comphenix.protocol.async.PacketSendingQueue.processPacketHolder(PacketSendingQueue.java:220)
	at com.comphenix.protocol.async.PacketSendingQueue.trySendPackets(PacketSendingQueue.java:138)
	at com.comphenix.protocol.async.PlayerSendingHandler.trySendClientPackets(PlayerSendingHandler.java:216)
	at com.comphenix.protocol.async.AsyncFilterManager.sendProcessedPackets(AsyncFilterManager.java:409)
	at com.comphenix.protocol.ProtocolLibrary$2.run(ProtocolLibrary.java:423)
	at org.bukkit.craftbukkit.v1_5_R3.scheduler.CraftTask.run(CraftTask.java:53)
	at org.bukkit.craftbukkit.v1_5_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:345)
	at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:513)
	at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:226)
	at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:477)
	at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:410)
	at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)