Leaning Script not working

[volostrs]

Whenever I die this script breaks. It has a error about it not finding the HRP.

local runService = game:GetService("RunService")

local MOMENTUM_FACTOR = 0.008
local MIN_MOMENTUM = 0
local MAX_MOMENTUM = math.huge
local SPEED = 16

local character = script.Parent
local humanoid = character.Humanoid
local humanoidRootPart = character.HumanoidRootPart
local m6d = nil
local originalM6dC0 = nil
local camera = workspace.CurrentCamera

if humanoid.RigType == Enum.HumanoidRigType.R15 then
	local lowerTorso = character.LowerTorso
	m6d = lowerTorso.Root
else
	m6d = humanoidRootPart.RootJoint
end
originalM6dC0 = m6d.C0

runService.Heartbeat:Connect(function(dt)
	local direction = humanoidRootPart.CFrame:VectorToObjectSpace(humanoid.MoveDirection)
	local momentum = humanoidRootPart.CFrame:VectorToObjectSpace(humanoidRootPart.Velocity)*MOMENTUM_FACTOR
	momentum = Vector3.new(
		
		math.clamp(math.abs(momentum.X), MIN_MOMENTUM, MAX_MOMENTUM),
		0,
		math.clamp(math.abs(momentum.Z), MIN_MOMENTUM, MAX_MOMENTUM)
	)

	local x = direction.X*momentum.X
	local z = direction.Z*momentum.Z

	local angles = nil
	if humanoid.RigType == Enum.HumanoidRigType.R15 then
		angles = {z, 0, -x}
	else
		angles = {-z, -x, 0}
	end

	m6d.C0 = m6d.C0:Lerp(originalM6dC0*CFrame.Angles(unpack(angles)), dt*SPEED)
end)

[volostrs]

Nevermind I already fixed this I added in these lines of code.

if not character or not character.Parent then
	character = character.CharacterAdded:Wait()
end
local humanoidRootPart = character:WaitForChild("HumanoidRootPart")