How to fix the error where it cant find the a thing in a model but its in the model ?

I'm making a tower defense game and there's an error with my code and the output says "Config is not a valid member of Model "Archer"" while it is. It will change the model to the next upgrade but wont change the stat info on the GUI. Can someone help me? Thanks

function tower.Attack(newTower, player)
    local Config = newTower.Config
    local target = FindNearestTarget(newTower, Config.Range.Value)

    if target and target:FindFirstChild("Humanoid") and target.Humanoid.Health > 0 then


        local targetCFrame = CFrame.lookAt(newTower.HumanoidRootPart.Position, target.HumanoidRootPart.Position)
        newTower.HumanoidRootPart.BodyGyro.CFrame = targetCFrame

        animateTowerEvent:FireAllClients(newTower, "Attack")

        target.Humanoid:TakeDamage(Config.Damage.Value)

        if target.Humanoid.Health <= 0 then
            player.Gold.Value += target.Humanoid.MaxHealth
        end

        task.wait(Config.Cooldown.Value)
    end

(The error is on line 2)