Bukkit

What steps will reproduce the problem?
1. Have a sign in a multiverse managed world

What is the expected output?
Working arenas

What do you see instead?
Arenas not loaded

What version of the product are you using?
1.0.1

Do you have an error log of what happened?
[05:09:06] [Server thread/ERROR]: Error occurred while enabling EnderWar v1.0.1 (Is it up to date?)
java.lang.NullPointerException
at me.BukkitPVP.EnderWar.Manager.SignManager.updateSign(SignManager.java:55) [?:?]
at me.BukkitPVP.EnderWar.Manager.Game.sign(Game.java:377) [?:?]
at me.BukkitPVP.EnderWar.Manager.Game.<init>(Game.java:52) [?:?]
at me.BukkitPVP.EnderWar.Manager.GameManager.load(GameManager.java:20) [?:?]
at me.BukkitPVP.EnderWar.Enderwar.onEnable(Enderwar.java:67) [?:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) [craftbukkit.jar:git-Spigot-5f38d38-12698ea]
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:340) [craftbukkit.jar:git-Spigot-5f38d38-12698ea]
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [craftbukkit.jar:git-Spigot-5f38d38-12698ea]
at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugin(CraftServer.java:357) [craftbukkit.jar:git-Spigot-5f38d38-12698ea]
at org.bukkit.craftbukkit.v1_8_R3.CraftServer.enablePlugins(CraftServer.java:317) [craftbukkit.jar:git-Spigot-5f38d38-12698ea]
at net.minecraft.server.v1_8_R3.MinecraftServer.s(MinecraftServer.java:414) [craftbukkit.jar:git-Spigot-5f38d38-12698ea]
at net.minecraft.server.v1_8_R3.MinecraftServer.k(MinecraftServer.java:378) [craftbukkit.jar:git-Spigot-5f38d38-12698ea]
at net.minecraft.server.v1_8_R3.MinecraftServer.a(MinecraftServer.java:333) [craftbukkit.jar:git-Spigot-5f38d38-12698ea]
at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:263) [craftbukkit.jar:git-Spigot-5f38d38-12698ea]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:525) [craftbukkit.jar:git-Spigot-5f38d38-12698ea]
at java.lang.Thread.run(Unknown Source) [?:1.7.0_71]

Please provide any additional information below.
Multiverse-Core as soft dependency should resolve that problem.