Spawner error

[00:10:55] [Server thread/INFO]: adopted3 issued server command: /spawner
[00:10:55] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'spawner' in plugin Spawner v2.0-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.NullPointerException
	at me.ryvix.spawner.SpawnerFunctions.getSpawnerName(SpawnerFunctions.java:337) ~[?:?]
	at me.ryvix.spawner.SpawnerFunctions.getSpawnerName(SpawnerFunctions.java:302) ~[?:?]
	at me.ryvix.spawner.SpawnerType.getTextFromType(SpawnerType.java:247) ~[?:?]
	at me.ryvix.spawner.SpawnerCommands.onCommand(SpawnerCommands.java:75) ~[?:?]
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[Spigot18.jar:git-Spigot-c46583f-e6f9fd4]
	... 14 more