NPCs don't walk

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#1

I’m having problems with my script where the NPCs don’t walk, they spawn randomly at the points as seen at the end of the code, however, they stay stacked and don’t move. There is nothing in the output.
When I use it without Pathfind they move, but slowly. I had to use Pathfind to prevent the NPCs from getting stuck in the walls.

Here is the code:

--NPCs System
local npcPoints = workspace.NPCWalkSystem:GetChildren()
local pathFind = game:GetService("PathfindingService")
local npcs = script.Model:GetChildren()

for _,v in npcPoints do
	v.Transparency = 1
	v.CanCollide = false	
end

function getNearPoint(npc, exclude)
	local closest = {nil,math.huge}--Part, distance
	
	local searchPoints = {}
	for _, v in npcPoints do
		if v ~= exclude then
			table.insert(searchPoints, v)
		end
	end
	
	
	for _,v in searchPoints do
			local disance = (v.Position - npc.HumanoidRootPart.Position).magnitude 
			if disance < closest[2] then
				closest = {v,disance}
		end
	end
	return closest[1]
end

local function walk(npc, lastPoint)
	local point = getNearPoint(npc, lastPoint)
	local lastPoint = point
	local path = pathFind:CreatePath()
	path:ComputeAsync(npc.HumanoidRootPart.Position, point.Position)
	local waypoints = path:GetWaypoints()
	for _,v in waypoints do
		npc.Humanoid:MoveTo(v.Position)
		npc.Humanoid.MoveToFinished:Wait()
	end
	spawn(function()
		walk(npc, lastPoint)
	end)
end

for _, v in npcs do
	v.Parent = workspace
	v:MoveTo(npcPoints[math.random(1, #npcPoints)].Position)
	--spawn a async function
	spawn(function()
		walk(v, nil)
	end)
end