attempt to index a nil value (global 'QBCore')

The problem

The console shows "attempt to index a nil value (global 'QBCore')" and your resource doesn't work or crashes on startup.

The cause

Your script uses QBCore before getting the core object, or qb-core starts after your resource. In QBCore you must request the core with the GetCoreObject export; assuming the global QBCore fails.

The solution

Get the core with the export and declare qb-core as a dependency:

-- client.lua / server.lua
local QBCore = exports['qb-core']:GetCoreObject()

-- Player (server):
local Player = QBCore.Functions.GetPlayer(source)
if not Player then return end
Player.Functions.AddMoney('cash', 100)

Step by step

1. 1.In server.cfg, `ensure qb-core` must come BEFORE `ensure your_resource`.
2. 2.Use `exports['qb-core']:GetCoreObject()` instead of the global QBCore.
3. 3.Add `dependency 'qb-core'` (or the dependencies block) in your fxmanifest.lua.
4. 4.Restart the whole server to apply the load order.