Group Manager Plugin Problem?!

HELP?! Theres a problem with my group manager.. "all commands are locked due to an error"
This is my groups.yml

groups:
Default:
default: true
permissions:
- -bukkit.command.kill
inheritance:
- g:groupmanager_default
- g:bukkit_default
- g:essentials_default
- g:towny_default
info:
prefix: '&7[Noobie]&7'
build: true
suffix: '&7'
Builder:
default: false
permissions: []
inheritance:
- default
- g:essentials_builder
- g:towny_builder
info:
prefix: '&b[Builder]&b'
build: true
suffix: '&e'
Moderator:
default: false
permissions: []
inheritance:
- builder
- g:groupmanager_moderator
- g:bukkit_moderator
- g:essentials_moderator
- g:towny_moderator
- g:vanish_moderator
info:
prefix: '&a[Mod]&a'
build: true
suffix: '&6'
Admin:
default: false
permissions: []
inheritance:
- moderator
- g:groupmanager_admin
- g:bukkit_admin
- g:essentials_admin
- g:towny_admin
- g:vanish_admin
info:
prefix: '&4[Admin]&4'
build: true
suffix: '&5'
Co-owner:
default: false
permissions:
- '*'
inheritance:
- Admin
- g:groupmanager_admin
- g:bukkit_admin
- g:essentials_admin
- g:towny_admin
- g:vanish_admin
info:
prefix: '&3 Co-owner]&3'
build: true
suffix: '&c&n'
Owner:
default: false
permissions:
- '*'
- -vanish.*
inheritance:
- Co-owner
info:
prefix: '&3[TheMasterOfAll]&3'
build: true
suffix: '&c&n&l'

Any help is appreciated D: