Kiteboard isn’t clearing the scoreboard correctly

[Gilthunderx]

Use this template as a guideline for reporting KiteBoard related issues. Please use pastebin or another text service for reporting stacktraces.

Make sure you have previously:

• Read the Wiki and Documentation for any information.
• Checked you're running a supported KiteBoard version.
• Checked the issue is not with a third party plugin. (commonly placeholder expansions)

Purchasing Username:

Issue
My players cant connect to my server and shows this error, when they try to join the are automatically disconnected

Expected Behaviour
Players can smoothly connect to the server.

Observed Behaviour
Kicks player instantly upon joining. it shows this error on my bungee console https://pastebin.com/Cx81BW7f

Server Software and Version
Purpur #960 1.16.5 and using java 8

Other Information

I'm using the following plugins in conjuntion with KiteBoard:
Plugins (47): AntiCraft, antiRedstoneClock, BetterRTP, BungeeGuard, ChatReaction, ChestShop, Chunky, Citizens, ClueScrolls, CoreProtect, CrateReloaded, CrazyAuctions, DeluxeChat, DeluxeCombat, DeluxeMenus, eGlow, Essentials, EssentialsSpawn, EZColors, FastAsyncWorldEdit (WorldEdit), HolographicDisplays, InventoryRollback, Item2Chat, KiteBoard*, LuckPerms, MessageAnnouncer, MineableSpawners, MobFarmManager, Multiverse-Core, NoCheatPlus, NoEnderchest*, ObsidianBreaker*, PlaceholderAPI, ProtocolLib, Rankup, ShopGUIPlus, spark, StreakRewards, SuperVanish, TAB, UltimateFactions, Vault, Votifier, VotingPlugin, Vouchers, WorldGuard, WorldGuardExtraFlags

Issue Screenshots or Evidence
Upload stacktraces to: https://paste.helpch.at or any other text service.