error log.

2016-03-26 03-25
=============================== GM ERROR LOG ===============================
= ERROR REPORT START - 2.0 (Phoenix) =

java.lang.IllegalArgumentException: The following file couldn't pass on Parser.
plugins\GroupManager\worlds\plotworld\groups.yml
	at org.anjocaido.groupmanager.dataholder.WorldDataHolder.loadGroups(WorldDataHolder.java:557)
	at org.anjocaido.groupmanager.dataholder.WorldDataHolder.loadGroups(WorldDataHolder.java:477)
	at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.loadWorld(WorldsHolder.java:678)
	at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.loadWorld(WorldsHolder.java:640)
	at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.loadAllSearchedWorlds(WorldsHolder.java:160)
	at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.initialLoad(WorldsHolder.java:104)
	at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.resetWorldsHolder(WorldsHolder.java:92)
	at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.<init>(WorldsHolder.java:59)
	at org.anjocaido.groupmanager.GroupManager.onEnable(GroupManager.java:167)
	at org.anjocaido.groupmanager.GroupManager.onEnable(GroupManager.java:91)
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:292)
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:340)
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405)
	at org.bukkit.craftbukkit.v1_9_R1.CraftServer.loadPlugin(CraftServer.java:361)
	at org.bukkit.craftbukkit.v1_9_R1.CraftServer.enablePlugins(CraftServer.java:321)
	at org.bukkit.craftbukkit.v1_9_R1.CraftServer.reload(CraftServer.java:745)
	at org.bukkit.Bukkit.reload(Bukkit.java:539)
	at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:25)
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141)
	at org.bukkit.craftbukkit.v1_9_R1.CraftServer.dispatchCommand(CraftServer.java:645)
	at org.bukkit.craftbukkit.v1_9_R1.CraftServer.dispatchServerCommand(CraftServer.java:631)
	at net.minecraft.server.v1_9_R1.DedicatedServer.aL(DedicatedServer.java:438)
	at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:401)
	at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:660)
	at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:559)
	at java.lang.Thread.run(Unknown Source)
Caused by: while scanning for the next token
found character 	 '\t(TAB)' that cannot start any token. (Do not use \t(TAB) for indentation)
 in 'reader', line 15, column 1:

    ^

	at org.yaml.snakeyaml.scanner.ScannerImpl.fetchMoreTokens(ScannerImpl.java:420)
	at org.yaml.snakeyaml.scanner.ScannerImpl.checkToken(ScannerImpl.java:226)
	at org.yaml.snakeyaml.parser.ParserImpl$ParseBlockMappingValue.produce(ParserImpl.java:586)
	at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:158)
	at org.yaml.snakeyaml.parser.ParserImpl.checkEvent(ParserImpl.java:143)
	at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:132)
	at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:229)
	at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:155)
	at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:229)
	at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:155)
	at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:229)
	at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:155)
	at org.yaml.snakeyaml.composer.Composer.composeDocument(Composer.java:122)
	at org.yaml.snakeyaml.composer.Composer.getSingleNode(Composer.java:105)
	at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:120)
	at org.yaml.snakeyaml.Yaml.loadFromReader(Yaml.java:450)
	at org.yaml.snakeyaml.Yaml.load(Yaml.java:393)
	at org.anjocaido.groupmanager.dataholder.WorldDataHolder.loadGroups(WorldDataHolder.java:552)
	... 25 more

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