Pex suddenly stopped working?

So I changed the prefix for some ranks..
This is my permissions.yml file...

-------------------------------------------------------

Code:

groups:
  default:
    options:
      default: true
    permissions:
    - modifyworld.*
  Dev:
    options:
      prefix: '&f[&l&dDev&f] '
      suffix: '&d'
schema-version: 1
users:
  a41c6871-0af0-4be5-905a-23ce19c6d3ef:
    permissions:
    - '*'
    group:
    - Dev
  94cb51f9-dee2-4fe1-9a98-2058951960a8:
    permissions:
    - '*'
    options:
      name: WiicoolV2
  Moderator:
    build: true
    inheritance:
    - Default
    prefix: '&f[&7Moderator&f] '
    suffix: '&7'
    permissions:
    - essentials.repair
    - essentials.heal
    - essentials.item
    - essentials.give
    - essentials.fly
    - essentials.kick
    - essentials.mute
    - essentials.tjail
    - essentials.jail
    - essentials.tempban
    - essentials.vanish
  Admin:
    build: true
    inheritance:
    - Moderator
    prefix: '&f[&cAdmin&f] '
    suffix: '&c'
    permissions:
    - essentials.gamemode
    - essentials.ban
    - essentials.unban
    - essentials.ipban
    - essentials.unipban
    - essentials.pardon
    - essentials.enchant
  Owner:
    build:true
    inheritance:
    - Admin
    prefix: '&9[&bOwner&9] '
    suffix: '&b'
    permissions:
    - '*'

Any ideas? Help would be great!

 

Whats the Error message @Veiizuh

 

@Veiizuh
Missing permission list for rank Dev?

 

@yPedx that doesn't effect anything, it just has no perms.

@Veiizuh I'm pretty sure I caught the problem.

for group owner,

Owner:
build:true

i think you need to put a space between build: (and) true like you previously did. Tag me if it changes anything.