Help request

Problem
Minepacks crashes players games when they try to use them.

What I have tried
I updated versions and even attempted the basic standalone version.

Details?
Server Version? Plugins? Client Version? Log?

I am sorry it took me so long to get back to you. I've had some personal issues recently.

We are using the standalone version at this moment but every version of the plugin crashes the server when you try and open your backpack.
Purpur 1.20.6 build 2217
[15:15:10 INFO]: Paper Plugins: (2):
[15:15:10 INFO]: - EconomyShopGUI, Minepacks
[15:15:10 INFO]: Bukkit Plugins: (73):
[15:15:10 INFO]: - AdvancedBan, ajLeaderboards, AuraSkills, BetterBalls, BetterRTP, BlueMap, BlueSlimeCore, ChestShop, ChestSort, Chunky
[15:15:10 INFO]: Citizens, ClearLag, CMI, CMILib, CombatLogX, CoreProtect, CrazyEnchantments, CyberLevels, DailyRewards, dDiscordBot
[15:15:10 INFO]: DecentHolograms, DeluxeMenus, DeluxeTags, Denizen, Depenizen, DiscordSRV, Duels, dynmap, Dynmap-Towny, EpicRename
[15:15:10 INFO]: ExcellentCrates, floodgate, GenBucket, GraveStonesPlus, GSit, Infiniteannouncements, Jobs, JShader, LibertyBans, LuckPerms
[15:15:10 INFO]: Mclogs, MiniBlocks, MiniMOTD, MRPremiumAddons, MythicalRaces, NBTAPI, NexEngine, nightcore, PlaceholderAPI, PlayerPoints
[15:15:10 INFO]: PlugManX, ProtocolLib, Quests, RocketPlaceholders, Skript, spark, SpawnerMeta, StaffChat, TAB, Tebex
[15:15:10 INFO]: Towny, TownyChat, UltraCosmetics, Vault, VeinMiner, ViaBackwards, ViaVersion, VotingPlugin, WildTools, WorldBorder
[15:15:10 INFO]: WorldEdit, WorldGuard, ZNPCsPlus (The plugin worked with all of these plugins before we updated to 1.20.6)
1.20.6 Vanilla launcher on client side
https://mclo.gs/NQ4aAD0

1.20.6 Paper (and Forks of Paper which is Purpur) isn’t supported right now. You need to wait for an Plugin update