WARNING Task #253278 for HealthBar v1.5.5 generated an excep

18.05 14:14:25 [Server] INFO at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)
18.05 14:14:25 [Server] INFO at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:410)
18.05 14:14:25 [Server] INFO at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:477)
18.05 14:14:25 [Server] INFO at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:226)
18.05 14:14:25 [Server] INFO at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:513)
18.05 14:14:25 [Server] INFO at org.bukkit.craftbukkit.v1_5_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:345)
18.05 14:14:25 [Server] INFO at org.bukkit.craftbukkit.v1_5_R3.scheduler.CraftTask.run(CraftTask.java:53)
18.05 14:14:25 [Server] INFO at com.gmail.filoghost.healthbar.MiscListeners$4.run(MiscListeners.java:91)
18.05 14:14:25 [Server] INFO at com.gmail.filoghost.healthbar.MiscListeners.access$0(MiscListeners.java:96)
18.05 14:14:25 [Server] INFO at com.gmail.filoghost.healthbar.MiscListeners.updatePlayer(MiscListeners.java:103)
18.05 14:14:25 [Server] INFO at org.bukkit.craftbukkit.v1_5_R3.entity.CraftPlayer.setScoreboard(CraftPlayer.java:991)
18.05 14:14:25 [Server] INFO java.lang.IllegalStateException: Cannot set scoreboard for invalid CraftPlayer
18.05 14:14:25 [Server] WARNING Task #253278 for HealthBar v1.5.5 generated an exception