尝试对空值进行索引

我正在尝试创建拾取物，但在拾取时出现错误。 错误信息如下:

Workspace.LogPickup.LogPickupScript:8: attempt to index nil with 'Parent'

脚本的第8行是变量player。 以下是代码:

local log = script.Parent
local logGuard = false

local function onTouch(partTouched)

    local character = partTouched.Parent
    local humanoid = character:FindFirstChildWhichIsA("Humanoid")
    local player = game.Players:GetPlayerFromCharacter(humanoid.Parent)
    local playerStats = player:FindFirstChild("leaderstats")
    local playerLogCount = playerStats:FindFirstChild("Has Log")

    if humanoid and logGuard == false then

        log.Transparency = 1
        log.CanCollide = false
        logGuard = true
        playerLogCount.Value = 1

        wait(5)

        log.Transparency = 0
        log.CanCollide = true
        logGuard = false

    end

end

log.Touched:Connect(onTouch)