Bukkit

bukkit: spigot 1.7.2
spectate: latest

[22:57:06] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'spectate' in plugin Spectate v2.0
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot.jar:git-Spigot-1292]
    at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:199) ~[spigot.jar:git-Spigot-1292]
    at org.bukkit.craftbukkit.v1_7_R1.CraftServer.dispatchCommand(CraftServer.java:548) ~[spigot.jar:git-Spigot-1292]
    at net.minecraft.server.v1_7_R1.PlayerConnection.handleCommand(PlayerConnection.java:962) [spigot.jar:git-Spigot-1292]
    at net.minecraft.server.v1_7_R1.PlayerConnection.a(PlayerConnection.java:817) [spigot.jar:git-Spigot-1292]
    at net.minecraft.server.v1_7_R1.PacketPlayInChat.a(PacketPlayInChat.java:28) [spigot.jar:git-Spigot-1292]
    at net.minecraft.server.v1_7_R1.PacketPlayInChat.handle(PacketPlayInChat.java:65) [spigot.jar:git-Spigot-1292]
    at net.minecraft.server.v1_7_R1.NetworkManager.a(NetworkManager.java:147) [spigot.jar:git-Spigot-1292]
    at net.minecraft.server.v1_7_R1.ServerConnection.c(ServerConnection.java:77) [spigot.jar:git-Spigot-1292]
    at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:698) [spigot.jar:git-Spigot-1292]
    at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:273) [spigot.jar:git-Spigot-1292]
    at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:560) [spigot.jar:git-Spigot-1292]
    at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:467) [spigot.jar:git-Spigot-1292]
    at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [spigot.jar:git-Spigot-1292]
Caused by: java.lang.IllegalArgumentException: Health must be between 0 and 20.0
    at org.bukkit.craftbukkit.v1_7_R1.entity.CraftLivingEntity.setHealth(CraftLivingEntity.java:75) ~[spigot.jar:git-Spigot-1292]
    at com.Chipmunk9998.Spectate.api.SpectateManager.startSpectating(SpectateManager.java:235) ~[?:?]
    at com.Chipmunk9998.Spectate.SpectateCommandExecutor.onCommand(SpectateCommandExecutor.java:324) ~[?:?]
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-1292]
    ... 13 more