Spawner ERROR with Spigot 1.8

[22:11:29] [Server thread/INFO]: adopted54 issued server command: /spawner give cow
[22:11:29] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'spawner' in plugin Spawner v1.9b-b0
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[Spigot18.jar:git-Spigot-c46583f-e6f9fd4]
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[Spigot18.jar:git-Spigot-c46583f-e6f9fd4]
	at org.bukkit.craftbukkit.v1_8_R1.CraftServer.dispatchCommand(CraftServer.java:645) ~[Spigot18.jar:git-Spigot-c46583f-e6f9fd4]
	at net.minecraft.server.v1_8_R1.PlayerConnection.handleCommand(PlayerConnection.java:1115) [Spigot18.jar:git-Spigot-c46583f-e6f9fd4]
	at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java:950) [Spigot18.jar:git-Spigot-c46583f-e6f9fd4]
	at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(PacketPlayInChat.java:26) [Spigot18.jar:git-Spigot-c46583f-e6f9fd4]
	at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(PacketPlayInChat.java:53) [Spigot18.jar:git-Spigot-c46583f-e6f9fd4]
	at net.minecraft.server.v1_8_R1.PacketHandleTask.run(SourceFile:13) [Spigot18.jar:git-Spigot-c46583f-e6f9fd4]
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.7.0_72]
	at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.7.0_72]
	at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:683) [Spigot18.jar:git-Spigot-c46583f-e6f9fd4]
	at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:316) [Spigot18.jar:git-Spigot-c46583f-e6f9fd4]
	at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:623) [Spigot18.jar:git-Spigot-c46583f-e6f9fd4]
	at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:526) [Spigot18.jar:git-Spigot-c46583f-e6f9fd4]
	at java.lang.Thread.run(Unknown Source) [?:1.7.0_72]
Caused by: java.lang.ExceptionInInitializerError
	at me.ryvix.spawner.SpawnerCommands.onCommand(SpawnerCommands.java:212) ~[?:?]
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[Spigot18.jar:git-Spigot-c46583f-e6f9fd4]
	... 14 more
Caused by: java.lang.IndexOutOfBoundsException: Index: 51, Size: 51
	at java.util.ArrayList.rangeCheck(Unknown Source) ~[?:1.7.0_72]
	at java.util.ArrayList.get(Unknown Source) ~[?:1.7.0_72]
	at me.ryvix.spawner.language.Language.getEntity(Language.java:111) ~[?:?]
	at me.ryvix.spawner.SpawnerType.<clinit>(SpawnerType.java:87) ~[?:?]
	at me.ryvix.spawner.SpawnerCommands.onCommand(SpawnerCommands.java:212) ~[?:?]
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[Spigot18.jar:git-Spigot-c46583f-e6f9fd4]
	... 14 more