Problem/Bug GroupManager Prefixes Not Showing

I use McMyAdmin and Spigot 1.8

I installed GroupManger and have added groups, set permissions, and prefixes. The permissions work, but the prefixes do not.

Group Manager Config

Code:

settings:
  config:
    # With this enabled anyone set as op has full permissions when managing GroupManager
    # The user will be able to promote players to the same group or even above.
    opOverrides: true
  
    # Default setting for 'mantogglevalidate'
    # true will cause GroupManager to attempt name matching by default.
    validate_toggle: true
    # ************************************************************************************************************************************************************
    # *** NOTE: Having this feature enabled can allow improper use of Command Blocks which may lead to undesireable permission changes. You have been warned! ***
    # ************************************************************************************************************************************************************
    allow_commandblocks: false
  
  data:
    save:
      # How often GroupManager will save it's data back to groups.yml and users.yml
      minutes: 10
      # Number of hours to retain backups (plugins/GroupManager/backup)
      hours: 24
    
  logging:
    # Level of detail GroupManager will use when logging.
    # Acceptable entries are - ALL,CONFIG,FINE,FINER,FINEST,INFO,OFF,SEVERE,WARNING
    level: INFO
  
  mirrors:
        # Worlds listed here have their settings mirrored in their children.
        # The first element 'world' is the main worlds name, and is the parent world.
        # subsequent elements 'world_nether' and 'world_the_end' are worlds which will use
        # the same user/groups files as the parent.
        # the element 'all_unnamed_worlds' specifies all worlds that aren't listed, and automatically mirrors them to it's parent.
        # Each child world can be configured to mirror the 'groups', 'users' or both files from its parent.
        world:
          world_nether:
          - users
          - groups
          world_the_end:
          - users
          - groups
          all_unnamed_worlds:
          - users
          - groups
    #  world2:      (World2 would have it's own set of user and groups files)
    #    world3:
    #    - users    (World3 would use the users.yml from world2, but it's own groups.yml)
    #    world4:
    #    - groups   (World4 would use the groups.yml from world2, but it's own users.yml)
    #  world5:
    #    - world6   (this would cause world6 to mirror both files from world5)
    groups:
        Owner:
        default: false
        permissions:
        - essentials.*
        - essentials.op
        - essentials.deop
        - worldedit.*
        - coreprotect.*
        inheritance: []
        info:
          prefix: '&4&lHig&c&lhEm&6&lpre&w&lss'
          build: true
          suffix: ''

Essentials Config (In Comments)

 

in essentials/config.yml you'll see this "change-displayname: false" or "change-displayname: true" on line 32, change so its true. And on line 42 you might see this "#add-prefix-suffix: false" make sure there is that # before it. I hope this helps.