Why does my weapon inconsistently do damage? "attempt to index nil with 'TakeDamage'

I have a script under my tool, along with a bool value to correspond to help the blade only do damage when the tool is activated. Problem is that it will do damage and sometimes it won't and I can't find out why.

Problem here: https://gyazo.com/b326864ddd8a327f81d789d38e523534

Error code "13:57:57.606 - Players.Storche.Backpack.Scythe.Script:22: attempt to index nil with 'TakeDamage'" or "Humanoid is not a valid member of workspace."

local CD = true
--local color = false
script.Parent.DMG.Value = false

script.Parent.Activated:Connect(function()
	if CD == true then
		--if color == false then
			--color = true
		script.Parent.DMG.Value = true 
		--script.Parent.Damage.Transparency = 0.75
		CD = false
		wait (1)
		--script.Parent.Damage.Transparency = 1
			CD = true
			--color = false
		--end
	end
end)
	script.parent.Damage.Touched:Connect(function(p)
	if script.Parent.DMG.Value == true then
		script.Parent.DMG.Value = false
		p.Parent:FindFirstChild("Humanoid"):TakeDamage(19)
		wait(1)


	end
end)

Error code is on line 22