Problem with mob collision(TDS)

Help and Feedback Scripting Support
1
  1. What do you want to achieve? Keep it simple and clear!
    So i was removing collision between mobs by setting collision group.
  2. What is the issue? Include screenshots / videos if possible!
    image

For some reason i get an error. I was doing that by the vid and in vid everything fine, but im getting a error
3. What solutions have you tried so far? Did you look for solutions on the Developer Hub? Yeah i watched youtube for solution

My code:

local PhysicsService = game:GetService("PhysicsService")
local ServerStorage = game:GetService("ServerStorage")

local mob = {}
function mob.Move(mob, map)
	local Humanoid = mob:WaitForChild("Humanoid")
	
	local WayPoints = workspace.WayPoints
	for waypoint=1, #WayPoints:GetChildren() do
		Humanoid:MoveTo(WayPoints[waypoint].Position)
		Humanoid.MoveToFinished:Wait()

	end
	
	mob:Destroy()
	
end

function mob.Spawn(name, quantity, map)
	local mobExists = ServerStorage.Mobs:FindFirstChild(name)
	
	if mobExists then
		for i=1, quantity do
			task.wait(0.5)
			local NewMob = mobExists:Clone()
			NewMob.HumanoidRootPart.CFrame = game.Workspace.Tunnel.Shadow1.CFrame
			NewMob.Parent = game.Workspace.MobFolder
			
			for i, object in ipairs(NewMob:GetDescendants()) do

				if object:IsA("BasePart") then
					PhysicsService:SetPartCollisionGroup(NewMob, "Mob")
				end
	
			end
			coroutine.wrap(mob.Move)(NewMob, map)
		end
		
		
	else
	warn("Mob doesn't exist:", name)	
	end
end

return mob
2

Ok nvm i’m just dumb, fixed that problem.