QBCore 'attempt to index a nil value' Fix

The error

SCRIPT ERROR: @my-resource/server/main.lua:12: attempt to index a nil value (local 'Player')

What it means

Lua throws this when you use . or : on something that is nil. In QBCore it almost always means QBCore.Functions.GetPlayer(source) returned nil (wrong source, player not loaded yet, or you called it after they dropped), or QBCore itself was never set because you forgot GetCoreObject().

The fix

local QBCore = exports['qb-core']:GetCoreObject()
RegisterNetEvent('my-resource:server:giveCash', function(amount)
    local src = source
    local Player = QBCore.Functions.GetPlayer(src)
    if not Player then return end -- player not loaded / invalid source
    amount = tonumber(amount)
    if not amount or amount <= 0 then return end
    Player.Functions.AddMoney('cash', amount, 'my-resource')
end)

Always capture source into a local right away, and check the result of GetPlayer before using it. On the client, wait for QBCore:Client:OnPlayerLoaded before reading PlayerData.

QBCore 'attempt to index a nil value' – Causes & Fix

The error

What it means

The fix