What version/build of NametagEdit are you using? Type /ver NametagEdit

Build #51

What version of Bukkit/Spigot/PaperSpigot are you using? Type /ver

1.10 latest build

What plugins are you using? Type /plugins

pex custom plugins nte

Please explain your issue?

when i set the nametag via the api NametagEdit.getAPI().setprefix
it does not get set for all players
or even for the player it self
this is debug is got maybe helps:

[19:24:30 INFO]: [NametagEdit] [DEBUG] Created FakeTeam NTE-27. Size: 1
[19:24:30 INFO]: [NametagEdit] [DEBUG] GC_inori has been added to team NTE-27
[19:24:30 INFO]: [NametagEdit] [DEBUG] Applying PlayerTag to GC_inori
[19:24:30 INFO]: [NametagEdit] [DEBUG] Applied tags to all online players.
[19:24:30 INFO]: [NametagEdit] [DEBUG] GC_inori already belongs to a similar team (NTE-27)
[19:24:30 INFO]: [NametagEdit] [DEBUG] Applying PlayerTag to GC_inori
[19:24:30 INFO]: [NametagEdit] [DEBUG] Applied tags to all online players.

How do you reproduce the issue?

set the prefix via the api

Is there an error(s) in the console? Please use: https://pastebin.com

Hmm. Please post your Players.yml. Looks like this is a tag conflict.