Unable to attempt to index nil with 'FindFirstChild' for a 'Humanoid'?

This is a Dagger ServerSide RemoteEvent,

I'm trying to reach the Character Humanoid When the Dagger Reaches the Player As outputed on Line 100 As Unable to Locate the Players Humanoid. When the Dagger Hit/Touches the Player You target. Tried Searching Roblox Wiki Help, Non were very understanding to figure out What Is really My issue.

Output Console

Players.S0NIC_Dev.Backpack.Dagger.DaggerFunction:100: attempt to index nil with 'FindFirstChild'

local gamemodel = workspace.GameModel
local tool = script.Parent
local daggerspeed = script.Parent.Config.daggerspeed.Value
local spinspeed = script.Parent.Config.spinspeed.Value
local maxdistance = script.Parent.Config.maxdistance.Value
local fadetm = script.Parent.Config.fadetm.Value
local character
local torso

script.Parent.Selected:Connect(function()
	character = script.Parent.Parent.Parent.Character
	torso = character.Torso
end)

	local dg = Instance.new("Part")
	dg.formFactor = "Custom"
	dg.Size = Vector3.new(0.2, 0.2, 0.2)
	dg.BrickColor = BrickColor.new("Really black")
	dg.Transparency = 0.2
	dg.Anchored = true
	dg.CanCollide = false
	dg.TopSurface = 0
	dg.BottomSurface = 0
	local m = Instance.new("SpecialMesh")
	m.MeshId = "http://www.roblox.com/asset/?id=20719463"
	m.Scale = Vector3.new(1, 1.4, 1)
	m.Parent = dg
	local loop = Instance.new("Sound")
	loop.SoundId = "http://www.roblox.com/asset/?id=146470466"
	loop.Volume = 1
	loop.Looped = true
	loop.Parent = dg
	
	local dagger_rot = CFrame.Angles(math.rad(-90), math.rad(0), math.rad(-90))
	local spin = CFrame.Angles(0, 0, 0)

function RayCast(ps1, ps2, ignore)
	local ray = Ray.new(
	    ps1,
	    (ps2 - ps1).unit * (ps1 - ps2).magnitude
	)
	local nign = ignore
	nign[#nign + 1] = character
	return workspace:FindPartOnRayWithIgnoreList(ray, nign) --hit, position
end

function GenIgnore()
	local result = {}
	local ch = game.Players:GetPlayers()
	for i = 1, #ch do
		local char = ch[i].Character
		if char ~= nil then
			local sc = char:GetChildren()
			for a = 1, #sc do
				if sc[a]:IsA("Hat") or sc[a]:IsA("Tool") then
					result[#result + 1] = sc[a]
				end
			end
		end
	end
	return result
end

function randomsound()
	local rnd = {"146594648", "146594640", "146457047"}
	return "http://www.roblox.com/asset/?id=" .. rnd[math.random(1, #rnd)]
end

script.Parent.RemoteEvent.OnServerEvent:Connect(function(player,ps)
	local pgui = player.PlayerGui
	local tps = torso.Position
	script.Parent = pgui
	tool.Parent = nil
	--DAGGER SCRIPT
	
	local ignores = GenIgnore()
	ignores[#ignores + 1] = gamemodel
	local tcf = CFrame.new(tps, ps)
	local travelled = 0
	dg.Parent = gamemodel
	dg.CFrame = tcf * dagger_rot * spin
	
	coroutine.resume(coroutine.create(function()
		wait(0.1)
		loop:play()
	end))
	
	while true do
		local st = tick()
		wait()
		local delta = (tick() - st)
		local dist = daggerspeed * delta
		local nps = tcf * CFrame.new(0, 0, -dist)
		spin = spin * CFrame.Angles(0, math.rad(-360 * delta * spinspeed), 0)
		travelled = travelled + dist
		
		--STUFF
		dg.Touched:Connect(function(player,hit,ps)
			local hit, pos = RayCast(tcf.p, nps.p, ignores)
				local hum = hit:FindFirstChild("Humanoid")
				if hum == nil then
					hum = hit.Parent.Parent:FindFirstChild("Humanoid")
				end
				if hum ~= nil then
					ignores[#ignores + 1] = hum.Parent
					local sdf = hum.Parent:FindFirstChild("ShieldDefence")
					if sdf ~= nil then
						sdf.TakeDamage.Value = true
					else
						hum.Parent:BreakJoints()
						local sndp = Instance.new("Part")
						sndp.formFactor = "Custom"
						sndp.Size = Vector3.new(0.2, 0.2, 0.2)
						sndp.Transparency = 1
						sndp.Anchored = true
						sndp.CanCollide = false
						sndp.CFrame = CFrame.new(pos)
						sndp.Parent = gamemodel
						local snd = Instance.new("Sound")
						snd.Volume = 1
						snd.SoundId = randomsound()
						snd.Parent = sndp
						coroutine.resume(coroutine.create(function()
							wait(0.1)
							snd:play()
							wait(1)
							sndp:remove()
						end))
					end
				else
					ignores[#ignores + 1] = hit
				end
			end)
		--STUFF
		
		tcf = nps
		dg.CFrame = tcf * dagger_rot * spin
		if travelled >= maxdistance then
			break
		end
	end
	
	local ld = 0
	while ld ~= 1 do
		local st = tick()
		wait()
		local delta = (tick() - st)
		ld = math.min(1, ld + delta / fadetm)
		local dist = daggerspeed * delta
		dg.Transparency = 0.2 + (0.8 * ld)
		spin = spin * CFrame.Angles(0, math.rad(-360 * delta * spinspeed), 0)
		tcf = tcf * CFrame.new(0, 0, -dist)
		dg.CFrame = tcf * dagger_rot * spin
	end
	
	dg:remove()
	
	--DAGGER SCRIPT
	print("The end")
	script.Parent = nil
end)

The problem is that raycasts can only get "parts" like right arm and left arm and right lower leg or right leg in r6, so hit can be "right lower arm" and hit.Parent will be the character, what you are doing is searching inside the character parts for a humanoid, you should be using hit.Parent:FindFirstChild("Humanoid") because hit.Parent is the character and you are searching inside the character for the humanoid (which exists), change line 100 to:

local hum = hit.Parent:FindFirstChild("Humanoid")

you should also probably put an if statement to check if hum is not nil so you don't get an error

if hum then
	-- Your code here
end