Triple Jumping Script wont work after the player dies and I can't figure out why. Anyone can help?

local plr = game.Players.LocalPlayer				
local char = game.Workspace:WaitForChild(plr.Name)	
local hum = char:WaitForChild("Humanoid")			
local sound = script.JumpSound						

stage = 0
jumping = false
falling = false


-- Jumps --
function onJump(val)
	jumping = val
	print(stage)
	
	if jumping == true and stage > 1 and stage < 3 then
		stage = 3
		char.Torso.Velocity = char.Torso.Velocity + Vector3.new(0, 60, 0)
		
		sound.Pitch = 1.5
		sound:Play()
		wait(1)
		stage = 0
	elseif jumping == true and stage > 0 and stage < 2 then
		stage = 2
		char.Torso.Velocity = char.Torso.Velocity + Vector3.new(0, 55, 0)
		
		sound.Pitch = 1.25
		sound:Play()
	elseif jumping == true and stage < 1 then
		stage = 1
		
		sound.Pitch = 1
		sound:Play()
	end
end
hum.Jumping:connect(onJump)



function onFall(val)
	falling = val
	if val == false then	
		wait(0.25)			
		if stage > 0 and falling == false then
			stage = 0		
		end
	end
end
hum.FreeFalling:connect(onFall)

This answer is not from me but someone who helped me in the discord known as TwinPotatos but

All I had to do was move it to StarterCharacterScripts and change the sound variable to

local sound = script:WaitForChild("JumpSound")	

So there's the answer