Config.yml for weird error

groups:
  default:
    permissions:
      permissions.build: true
      essentials.item: true
      essentials.build.*: true
    inheritance:
    - default
  Member:
    permissions:
      permissions.build: true
    inheritance:
    - default
  Redstoner:
    permissions:
      permissions.build: true
    inheritance:
    - Member
  Moderator:
    permissions:
      permissions.build: true
    inheritance:
    - Redstoner
  Admin:
    permissions:
      permissions.build: true
    inheritance:
    - Moderator
  Co-Owner:
    permissions:
      permissions.build: true
    inheritance:
    - Admin
  Owner:
    permissions:
      permissions.build: true
    inheritance:
    - Co-Owner
users:
  cyberdork34:
    groups:
    - default