Armor Stand Error

[22:50:12] [Server thread/INFO]: PhillyCheezsteak issued server command: /mm mobs spawn GoblinB
[22:50:12] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'mm' in plugin MythicMobs v2.0.0
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot-latest.jar:git-Spigot-ea179b3-6e0120a]
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot-latest.jar:git-Spigot-ea179b3-6e0120a]
	at org.bukkit.craftbukkit.v1_8_R2.CraftServer.dispatchCommand(CraftServer.java:646) ~[spigot-latest.jar:git-Spigot-ea179b3-6e0120a]
	at net.minecraft.server.v1_8_R2.PlayerConnection.handleCommand(PlayerConnection.java:1133) [spigot-latest.jar:git-Spigot-ea179b3-6e0120a]
	at net.minecraft.server.v1_8_R2.PlayerConnection.a(PlayerConnection.java:968) [spigot-latest.jar:git-Spigot-ea179b3-6e0120a]
	at net.minecraft.server.v1_8_R2.PacketPlayInChat.a(PacketPlayInChat.java:45) [spigot-latest.jar:git-Spigot-ea179b3-6e0120a]
	at net.minecraft.server.v1_8_R2.PacketPlayInChat.a(PacketPlayInChat.java:1) [spigot-latest.jar:git-Spigot-ea179b3-6e0120a]
	at net.minecraft.server.v1_8_R2.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-latest.jar:git-Spigot-ea179b3-6e0120a]
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_31]
	at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_31]
	at net.minecraft.server.v1_8_R2.SystemUtils.a(SourceFile:60) [spigot-latest.jar:git-Spigot-ea179b3-6e0120a]
	at net.minecraft.server.v1_8_R2.MinecraftServer.A(MinecraftServer.java:710) [spigot-latest.jar:git-Spigot-ea179b3-6e0120a]
	at net.minecraft.server.v1_8_R2.DedicatedServer.A(DedicatedServer.java:368) [spigot-latest.jar:git-Spigot-ea179b3-6e0120a]
	at net.minecraft.server.v1_8_R2.MinecraftServer.z(MinecraftServer.java:651) [spigot-latest.jar:git-Spigot-ea179b3-6e0120a]
	at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java:554) [spigot-latest.jar:git-Spigot-ea179b3-6e0120a]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_31]
Caused by: java.lang.ClassCastException: net.minecraft.server.v1_8_R2.EntityArmorStand cannot be cast to net.minecraft.server.v1_8_R2.EntityInsentient
	at net.elseland.xikage.MythicMobs.VolatileCode.VolatileCodeEnabled_v1_8_R2.setMobSpeed(VolatileCodeEnabled_v1_8_R2.java:170) ~[?:?]
	at net.elseland.xikage.MythicMobs.Mobs.MythicMob.applyMobOptions(MythicMob.java:355) ~[?:?]
	at net.elseland.xikage.MythicMobs.Mobs.MythicMob.spawn(MythicMob.java:323) ~[?:?]
	at net.elseland.xikage.MythicMobs.Mobs.MobSpawner.SpawnMythicMob(MobSpawner.java:24) ~[?:?]
	at net.elseland.xikage.MythicMobs.Commands.MobCommands.cmdMobSpawn(MobCommands.java:133) ~[?:?]
	at net.elseland.xikage.MythicMobs.Commands.MobCommands.parseCommands(MobCommands.java:42) ~[?:?]
	at net.elseland.xikage.MythicMobs.Commands.CommandHandler.onCommand(CommandHandler.java:46) ~[?:?]
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot-latest.jar:git-Spigot-ea179b3-6e0120a]
	... 15 more