[21:22:15 INFO]: Chief issued server command: /rpg set Chief 20L
[21:22:49 INFO]: Chief issued server command: /rpg set Chief 50:
[21:22:50 ERROR]: Could not pass event PlayerXPChangeEvent to RPGLevelSystem v1.1
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[gg112.jar:git-Spigot-3fb9445-2b6c9f4]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[gg112.jar:git-Spigot-3fb9445-2b6c9f4]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [gg112.jar:git-Spigot-3fb9445-2b6c9f4]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [gg112.jar:git-Spigot-3fb9445-2b6c9f4]
        at com.SirBlobman.rpg.utility.PluginUtil.call(PluginUtil.java:34) [RPG_Level_System.jar:?]
        at com.SirBlobman.rpg.utility.PlayerUtil.setXP(PlayerUtil.java:62) [RPG_Level_System.jar:?]
        at com.SirBlobman.rpg.command.CommandRPG.onCommand(CommandRPG.java:30) [RPG_Level_System.jar:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) [gg112.jar:git-Spigot-3fb9445-2b6c9f4]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) [gg112.jar:git-Spigot-3fb9445-2b6c9f4]
        at org.bukkit.craftbukkit.v1_11_R1.CraftServer.dispatchCommand(CraftServer.java:650) [gg112.jar:git-Spigot-3fb9445-2b6c9f4]
        at net.minecraft.server.v1_11_R1.PlayerConnection.handleCommand(PlayerConnection.java:1354) [gg112.jar:git-Spigot-3fb9445-2b6c9f4]
        at net.minecraft.server.v1_11_R1.PlayerConnection.a(PlayerConnection.java:1189) [gg112.jar:git-Spigot-3fb9445-2b6c9f4]
        at net.minecraft.server.v1_11_R1.PacketPlayInChat.a(PacketPlayInChat.java:45) [gg112.jar:git-Spigot-3fb9445-2b6c9f4]
        at net.minecraft.server.v1_11_R1.PacketPlayInChat.a(PacketPlayInChat.java:1) [gg112.jar:git-Spigot-3fb9445-2b6c9f4]
        at net.minecraft.server.v1_11_R1.PlayerConnectionUtils$1.run(SourceFile:13) [gg112.jar:git-Spigot-3fb9445-2b6c9f4]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_181]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_181]
        at net.minecraft.server.v1_11_R1.SystemUtils.a(SourceFile:46) [gg112.jar:git-Spigot-3fb9445-2b6c9f4]
        at net.minecraft.server.v1_11_R1.MinecraftServer.D(MinecraftServer.java:747) [gg112.jar:git-Spigot-3fb9445-2b6c9f4]
        at net.minecraft.server.v1_11_R1.DedicatedServer.D(DedicatedServer.java:399) [gg112.jar:git-Spigot-3fb9445-2b6c9f4]
        at net.minecraft.server.v1_11_R1.MinecraftServer.C(MinecraftServer.java:678) [gg112.jar:git-Spigot-3fb9445-2b6c9f4]
        at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:576) [gg112.jar:git-Spigot-3fb9445-2b6c9f4]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_181]
Caused by: java.lang.IllegalArgumentException: Progress must be between 0.0 and 1.0 (-5.8)
        at com.google.common.base.Preconditions.checkArgument(Preconditions.java:148) ~[gg112.jar:git-Spigot-3fb9445-2b6c9f4]
        at org.bukkit.craftbukkit.v1_11_R1.boss.CraftBossBar.setProgress(CraftBossBar.java:123) ~[gg112.jar:git-Spigot-3fb9445-2b6c9f4]
        at com.SirBlobman.rpg.listener.ListenBossBar.update(ListenBossBar.java:65) ~[?:?]
        at com.SirBlobman.rpg.listener.ListenBossBar.xp(ListenBossBar.java:31) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_181]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_181]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_181]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_181]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[gg112.jar:git-Spigot-3fb9445-2b6c9f4]
        ... 22 more
[21:22:51 INFO]: Chief issued server command: /rpg set Chief 50L