[SEVERE] Could not load 'plugins\MobArena.jar' in folder 'plugins': 
while scanning for the next token
found character   '\t' that cannot start any token
 in "<reader>", line 63, column 1:
              
    ^

  at org.yaml.snakeyaml.scanner.ScannerImpl.fetchMoreTokens(ScannerImpl.java:360)
  at org.yaml.snakeyaml.scanner.ScannerImpl.checkToken(ScannerImpl.java:183)
  at org.yaml.snakeyaml.parser.ParserImpl$ParseBlockMappingKey.produce(ParserImpl.java:564)
  at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:163)
  at org.yaml.snakeyaml.parser.ParserImpl.checkEvent(ParserImpl.java:148)
  at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:228)
  at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:160)
  at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:230)
  at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:160)
  at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:230)
  at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:160)
  at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:230)
  at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:160)
  at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:230)
  at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:160)
  at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:230)
  at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:160)
  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:124)
  at org.yaml.snakeyaml.Yaml.load(Yaml.java:264)
  at org.bukkit.util.config.Configuration.load(Configuration.java:82)
  at org.bukkit.plugin.java.JavaPlugin.initialize(JavaPlugin.java:157)
  at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:175)
  at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:213)
  at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:136)
  at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:143)
  at org.bukkit.craftbukkit.CraftServer.<init>(CraftServer.java:110)
  at net.minecraft.server.ServerConfigurationManager.<init>(ServerConfigurationManager.java:51)
  at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:133)
  at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:337)
  at net.minecraft.server.ThreadServerApplication.run(SourceFile:422)