Problem with Prefixes

Hi, I have a Minecraft server on which I have created some ranks with PermissionsEx. Unfortunately, I have a problem with the prefixes. For example, with the YouTuber rank the chat and the tab is the correct prefix, but above my head is only "Sogapeu" and no ,,YouTuber". What can be the reason?

My Plugins:
AAC
AdminShop
advancedShop
AreaShop
ChatManager
Chattab
ChestShop
ClearLag
DynamapPlotMe
EditableSign
Essentials
Essentialchat
EssentialsSpawn
HolographicDisplays
ItemTagger
LWC
ModifyWorld
Multiverse-Core
Multiverse-Portals
NameTagEdit
NoCheatPlus
PermissionsEx
PlotMe-core
PlotMe-defaultgenerator
ProtocolLib
RandomBox
serverSigns
supplysign
TimTheEnchanter
Umfrage (a german plugin)
Vanilla
Vault
Worldedit
WorldGuard

Sorry for my bad english ^^

 

@Sogapeu
The reason is that prefixes aren't supposed to be shown above player heads. You would have to get a separate plugin to do that.

 

Which plugin for example?

 

<Edit by Moderator: Redacted not allowed paid resource url>

 

Ok, thank you