Bug Report

Type /ver NametagEdit and post the output.
[12:21:00 INFO]: NametagEdit version 4.5.8

What version of Bukkit/Spigot/PaperSpigot are you using? Type /ver
[12:21:09 INFO]: This server is running Paper version git-Paper-790 (MC: 1.16.5) (Implementing API version 1.16.5-R0.1-SNAPSHOT)
(bungeecord)

What plugins are you using? Type /plugins
12:21:31] [Server thread/INFO]: Plugins (35): BungeeTabListPlus, Citizens, CraftingStore, DiSky, Ersatz*, Essentials, EssentialsChat, EssentialsSpawn, FeatherBoard, HeadDatabase, HeadDisplays, HolographicDisplays, InvisibleItemFrames, JetsPrisonMines, LiteBans, LuckPerms, Meteoren, MVdWPlaceholderAPI*, NametagEdit, PlaceholderAPI, ProtocolLib, SkBee, Skent*, Skore, skRayFall, Skript, skript-gui, skript-reflect, skript-yaml, Skungee, Vault, ViaVersion, VoxelSniper, WorldEdit, WorldGuard

Please explain your issue. How do you trigger it?
On connection to the server, error "(player) lost connection: Internal Exception: io.netty.handler.codec.EncoderException: java.lang.NullPointerException: Cannot invoke "java.lang.Enum.ordinal()" because "oenum" is null"

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

Update: I did not check the issues tab prior to opening my issue. Downloaded fix for NTE. Issue resolved.