Bug Report

Type /ver NametagEdit and post the output.
4.5.14

What version of Bukkit/Spigot/PaperSpigot are you using? Type /ver
git-Paper-399

What plugins are you using? Type /plugins
Antipluginlookup, Betterrtp, Claimchunk, Deadchest, DiscordSRV, dynmap, Essentials, Grimac, Joinmessageplus, LPC, Luckperms, Nametagedit, Picojobs, Placeholderapi, PLaytime, Quicksave, Quickshop, Restartvote, ServersNCP, Simplescore, Tablist, Uberenchant, Vault, Worldedit, Worldguard, youhubcommand

Please explain your issue. How do you trigger it?
It triggers when I am trying to order my groups

Are there any errors in the console? Please use: https://pastebin.com
https://pastebin.com/JaxNnMFd