Compatibility issue when using Json.lua causes errors in other Lua scripts

[sppeect]

Title: Compatibility issue when using Json.lua causes errors in other Lua scripts

Description:
When using Json.lua located in lib/core, other Lua scripts are breaking, resulting in errors. Below are two examples of errors that occur:

Exemple 1:

2024-06-18 02:29:27 - Lua Script Error: [Scripts Interface]
2024-06-18 02:29:27 - /home/healmot/server/data/scripts/weapons/wands.lua
2024-06-18 02:29:27 - /home/healmot/server/data/scripts/weapons/wands.lua:1: attempt to index a nil value (global 'classBalancerConfig')
2024-06-18 02:29:27 - stack traceback:
2024-06-18 02:29:27 - [C]: in metamethod 'index'

On script global.lua:

classBalancerConfig = {
    knight = {
        damageMultiplierMin = 2.5,
        damageMultiplierMax = 5,
        defense = 10
    },
    paladin = {
        damageMultiplierMin = 4,
        damageMultiplierMax = 8,
        defense = 8.5
    },
    druid = {
        damageMultiplierMin = 3.25,
        damageMultiplierMax = 6.5,
        defense = 3
    },
    sorcerer = {
        damageMultiplierMin = 4.75,
        damageMultiplierMax = 9.5,
        defense = 2
    }
}

Exemple 2 :

2024-06-18 02:52:31 - Lua Script Error: [Scripts Interface]
2024-06-18 02:52:31 - /home/healmot/server/data/scripts/UpgradeSystem/core.lua
2024-06-18 02:52:31 - /home/healmot/server/data/scripts/UpgradeSystem/core.lua:19: attempt to index a CreatureEvent value (local 'LoginEvent')
2024-06-18 02:52:31 - stack traceback:
2024-06-18 02:52:31 - [C]: in metamethod 'newindex'
2024-06-18 02:52:31 - /home/healmot/server/data/scripts/UpgradeSystem/core.lua:19: in main chunk

[Najtu]

Not sure what json.lua implementation you are using, but most json.lua i found on github do not support LUA 5.4

You would need to find one that supports it.