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Name cannot be null
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Stream cannot be null
java.lang.IllegalArgumentException: Name cannot be null at org.apache.commons.lang.Validate.notNull(Validate.java:192)[spigot-1.11.jar:git-Spigot-16c940b-f15e07b] at org.bukkit.craftbukkit.v1_11_R1.CraftServer.getWorld(CraftServer.java:1020)[spigot-1.11.jar:git-Spigot-16c940b-f15e07b] at org.bukkit.Bukkit.getWorld(Bukkit.java:500)[spigot-1.11.jar:git-Spigot-16c940b-f15e07b] at com.garbagemule.MobArena.ArenaImpl.<init>(ArenaImpl.java:189)[?:?] at com.garbagemule.MobArena.ArenaMasterImpl.loadArena(ArenaMasterImpl.java:578)[?:?] at com.garbagemule.MobArena.ArenaMasterImpl.loadArenasInWorld(ArenaMasterImpl.java:535)[?:?] at com.garbagemule.MobArena.ArenaMasterImpl.loadArenas(ArenaMasterImpl.java:519)[?:?] at com.garbagemule.MobArena.ArenaMasterImpl.initialize(ArenaMasterImpl.java:238)[?:?] at com.garbagemule.MobArena.MobArena.onEnable(MobArena.java:93)[?:?] at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:271)[spigot-1.11.jar:git-Spigot-16c940b-f15e07b] at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:337)[spigot-1.11.jar:git-Spigot-16c940b-f15e07b] at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405)[spigot-1.11.jar:git-Spigot-16c940b-f15e07b] at com.rylinaux.plugman.util.PluginUtil.load(PluginUtil.java:363)[PlugMan.jar:?] at com.rylinaux.plugman.command.LoadCommand.execute(LoadCommand.java:114)[PlugMan.jar:?] at com.rylinaux.plugman.PlugManCommandHandler.onCommand(PlugManCommandHandler.java:95)[PlugMan.jar:?] at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)[spigot-1.11.jar:git-Spigot-16c940b-f15e07b] at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141)[spigot-1.11.jar:git-Spigot-16c940b-f15e07b] at org.bukkit.craftbukkit.v1_11_R1.CraftServer.dispatchCommand(CraftServer.java:647)[spigot-1.11.jar:git-Spigot-16c940b-f15e07b] at org.bukkit.craftbukkit.v1_11_R1.CraftServer.dispatchServerCommand(CraftServer.java:633)[spigot-1.11.jar:git-Spigot-16c940b-f15e07b] at net.minecraft.server.v1_11_R1.DedicatedServer.aM(DedicatedServer.java:437)[spigot-1.11.jar:git-Spigot-16c940b-f15e07b] at net.minecraft.server.v1_11_R1.DedicatedServer.D(DedicatedServer.java:400)[spigot-1.11.jar:git-Spigot-16c940b-f15e07b] at net.minecraft.server.v1_11_R1.MinecraftServer.C(MinecraftServer.java:675)[spigot-1.11.jar:git-Spigot-16c940b-f15e07b] at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:574)[spigot-1.11.jar:git-Spigot-16c940b-f15e07b]