(SOLVED) Raycast doesn't get an npc at all?

hi. i've written this script where it gets the nametag of an npc and puts it on a textlabel. when it gets the part/npc, it sends the name and parent name. but this doesn't work?

gif of the error: as you can see at the bottom left at the end of the gif, nothing is being outputted when my mouse is directly on the npc. i've tried everything to get this to work https://gyazo.com/6b5197cd95f4e3345ff1066ce10a1d96

localscript that is meant to make the nametag appear

game:GetService("RunService").RenderStepped:Connect(function()
	local mouse = game.Players.LocalPlayer:GetMouse()
	
	mouse.TargetFilter = nil
	script.Parent.Namez.Position = UDim2.new(0, mouse.X, 0, mouse.Y)
	
	local mouseUnitRay = mouse.UnitRay
	local ray = Ray.new(mouseUnitRay.Origin, mouseUnitRay.Direction * 1000)
	local Target, position = game.ReplicatedStorage.GetRay:InvokeServer(ray, {})
	
	if Target then
		if Target.Parent.Parent == workspace.Zombies then
			script.Parent.Namez.character.Text = Target.Parent.Name
			script.Parent.Namez.level.Text = "Enemy"
			script.Parent.Namez.Visible = true
		elseif game.ReplicatedStorage:FindFirstChild(Target.Parent.Parent.Name) then
			script.Parent.Namez.character.Text = Target.Parent.Parent.Name
			script.Parent.Namez.level.Text = "Level ".. string.sub(Target.Parent.Name, #Target.Parent.Name - 1)
			
			script.Parent.Namez.Visible = true
		else
			script.Parent.Namez.Visible = false
		end
	else
		script.Parent.Namez.Visible = false
	end
end)

script that actually sends the ray

local function FindPart(plr, ray, list)
	local Target ,Position = workspace:FindPartOnRay(ray)
	pcall(function() print(Target.Name) print(Target.Parent.Name) end)
	
	return Target,Position
end

local GetRay = game:GetService("ReplicatedStorage").GetRay

GetHealth.OnServerInvoke = ReturnHealth

Solved, problem was with collision groups.