Why won't my player look at mouse.hit?

Local script in starterplayerscripts.

local Players = game:GetService("Players")
local player = Players.LocalPlayer
local mouse = player:GetMouse()
local char = player.Character

local function onCharacterAdded(character)
	while true do
    if not char or not char.Parent then
        char = player.CharacterAdded:Wait()
    end
    local hrp = char:WaitForChild("HumanoidRootPart")
    char.PrimaryPart = hrp
    if mouse.Hit then
        local lookAt = Vector3.new(mouse.Hit.p.X, hrp.Position.Y, mouse.Hit.p.Z)
        char:SetPrimaryPartCFrame(CFrame.new(hrp.Position, lookAt))
    end
end
end

local function onPlayerAdded(player)
	player.CharacterAdded:Connect(onCharacterAdded)
end
 
Players.PlayerAdded:Connect(onPlayerAdded)