Groupmanager error

I put the groups.yml into an online ymal parser and it said it was good. Here is the error message and the groups.
at org.anjocaido.groupmanager.dataholder.WorldDataHolder.loadGroups(WorldDataHolder.java:516)
at org.anjocaido.groupmanager.dataholder.WorldDataHolder.loadGroups(WorldDataHolder.java:416)
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:169)
at org.anjocaido.groupmanager.GroupManager.onEnable(GroupManager.java:93)
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:217)
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:457)
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:381)
at org.bukkit.craftbukkit.v1_6_R1.CraftServer.loadPlugin(CraftServer.java:282)
at org.bukkit.craftbukkit.v1_6_R1.CraftServer.enablePlugins(CraftServer.java:264)
at net.minecraft.server.v1_6_R1.MinecraftServer.l(MinecraftServer.java:313)
at net.minecraft.server.v1_6_R1.MinecraftServer.f(MinecraftServer.java:290)
at net.minecraft.server.v1_6_R1.MinecraftServer.a(MinecraftServer.java:250)
at net.minecraft.server.v1_6_R1.DedicatedServer.init(DedicatedServer.java:151)
at net.minecraft.server.v1_6_R1.MinecraftServer.run(MinecraftServer.java:391)
at net.minecraft.server.v1_6_R1.ThreadServerApplication.run(SourceFile:582)


And the groups:

# Group inheritance
#
# Any inherited groups prefixed with a g: are global groups
# and are inherited from the GlobalGroups.yml.
#
# Groups without the g: prefix are groups local to this world
# and are defined in the this groups.yml file.
#
# Local group inheritances define your promotion tree when using 'manpromote/mandemote'

Warrior:
Default:
default: true
permissions:
- -bukkit.command.kill
- -essentials.sethome
inheritance:
- g:groupmanager_default
- g:bukkit_default
- g:essentials_default
- g:towny_default
info:
prefix: '&6Warrior'
build: true
suffix: ''
Spartan:
default: false
permissions: []
inheritance:
- default
- g:essentials_builder
- g:towny_builder
info:
prefix: '&2Spartan'
build: true
suffix: ''
Moderator:
default: false
permissions: [
-worldedit.*]
inheritance:
- builder
- g:groupmanager_moderator
- g:bukkit_moderator
- g:essentials_moderator
- g:towny_moderator
- g:vanish_moderator
info:
prefix: '&5Moderator'
build: true
suffix: ''
Admin:
default: false
permissions: [
-worldedit.*]
inheritance:
- moderator
- g:groupmanager_admin
- g:bukkit_admin
- g:essentials_admin
- g:towny_admin
- g:vanish_admin
info:
prefix: '&c'
build: true
suffix: ''
Owner:
default: false
permissions:
- '*'
- -vanish.*
inheritance:
- admin
info:
prefix: '&4'
build: true
suffix: ''

Thanks.