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](https://mclo.gs/IlJKz7R)```


### Bug Description

Clicking on an item in shop causes a crash

### Steps to Reproduce

Login with 1.8.8 client
open shop
try to buy something
crash

### Expected Behavior

I should be able to buy somthing from shop

### Additional Server Info

I use a bungee server with eaglerxbungee
The backend has EconomyShopGUI, AdvancedBanX, Essentials, EssentialsChat, LuckPerms, ProtocolLib, Slimefun, spark, SuperiorSkyblock2, Vault, ViaBackwards, ViaRewind, ViaVersion, WorldEdit, WorldGuard

### Checklist

- [x] Via plugins are only running on **EITHER** the backend servers (e.g. Paper) **OR** the proxy (e.g. Velocity), **not on both**.
- [x] I have included a ViaVersion dump.
- [x] If applicable, I have included a paste (**not a screenshot**) of the error.
- [x] I have tried the latest build(s) from https://ci.viaversion.com/ and the issue still persists.