IllegalStateException

I get this error:

Code:

Cannot set scoreboard for invalid CraftPlayer
    at org.bukkit.craftbukkit.v1_8_R1.entity.CraftPlayer.setScoreboard(CraftPlayer.java:1245) ~[Spigot.jar:git-Bukkit-33d5de3]
    at dev.dlange.OrchestraV2.managers.Manager.boardAdd(Manager.java:117) ~[?:?]
    at dev.dlange.OrchestraV2.listeners.JoinListeners$3.run(JoinListeners.java:341) ~[?:?]
    at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftTask.run(CraftTask.java:53) ~[Spigot.jar:git-Bukkit-33d5de3]
    at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:349) [Spigot.jar:git-Bukkit-33d5de3]
    at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:668) [Spigot.jar:git-Bukkit-33d5de3]
    at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:284) [Spigot.jar:git-Bukkit-33d5de3]
    at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:609) [Spigot.jar:git-Bukkit-33d5de3]
    at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:517) [Spigot.jar:git-Bukkit-33d5de3]
    at java.lang.Thread.run(Unknown Source) [?:1.8.0_45]

At this line:

Code:

            craftPlayer.setScoreboard(board);

The craftplayer is defined here:

Code:

  craftPlayer = (CraftPlayer) p; 

 

You can't create a scoreboard for a craftplayer. If you paste more from your code I edit it for you but you don't so you should edit it yourself

 

@Ungemonstert I used to be for normal player, then it said this error so i changed it to CraftPlayer

 

http://gyazo.com/2bd51eaf8702d258d40bdbc3d1442753
It appears that the playerConnection is disconnected, show me your JoinListeners run method