My groupmanager isnt working

Whenever I use groupmanager, it says I cannot use commands. Here is the error:

ERROR REPORT START - 2.1.31 (Phoenix) =

java.lang.IllegalArgumentException: The following file couldn't pass on Parser.
plugins\GroupManager\worlds\world\groups.yml
at org.anjocaido.groupmanager.dataholder.WorldDataHolder.loadGroups(WorldDataHolder.java:590)
at org.anjocaido.groupmanager.dataholder.WorldDataHolder.loadGroups(WorldDataHolder.java:510)
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.initialWorldLoading(WorldsHolder.java:110)
at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.initialLoad(WorldsHolder.java:100)
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:179)
at org.anjocaido.groupmanager.GroupManager.onEnable(GroupManager.java:103)
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321)
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:327)
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:404)
at org.bukkit.craftbukkit.v1_8_R1.CraftServer.loadPlugin(CraftServer.java:340)
at org.bukkit.craftbukkit.v1_8_R1.CraftServer.enablePlugins(CraftServer.java:312)
at net.minecraft.server.v1_8_R1.MinecraftServer.q(MinecraftServer.java:394)
at net.minecraft.server.v1_8_R1.MinecraftServer.k(MinecraftServer.java:362)
at net.minecraft.server.v1_8_R1.MinecraftServer.a(MinecraftServer.java:317)
at net.minecraft.server.v1_8_R1.DedicatedServer.init(DedicatedServer.java:190)
at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:473)
at java.lang.Thread.run(Thread.java:745)
Caused by: while parsing a block mapping
in "<reader>", line 11, column 1:
groups:
^
expected <block end>, but found BlockMappingStart
in "<reader>", line 98, column 3:
Owner:
^

at org.yaml.snakeyaml.parser.ParserImpl$ParseBlockMappingKey.produce(ParserImpl.java:575)
at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:161)
at org.yaml.snakeyaml.parser.ParserImpl.checkEvent(ParserImpl.java:146)
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:123)
at org.yaml.snakeyaml.composer.Composer.getSingleNode(Composer.java:106)
at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:121)
at org.yaml.snakeyaml.Yaml.loadFromReader(Yaml.java:480)
at org.yaml.snakeyaml.Yaml.load(Yaml.java:423)
at org.anjocaido.groupmanager.dataholder.WorldDataHolder.loadGroups(WorldDataHolder.java:585)
... 20 more

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@_Creepylord_ It's a problem with your YAML formatting. Run it through a parser. It shows you where all of your errors are.