Why is my custom pathfinding script not working and agent that find's path not moving?

I was trying to make my own pathfinding script which is below

local module = {}
	-- functions for movement of agent
	
	-- function to move forward
	local function forward(agent)
		agent.Position = Vector3.new(agent.Position.X + 1, agent.Position.Y, agent.Position.Z)
	end
	
	-- function to move backward
	local function backward(agent)
		agent.Position = Vector3.new(agent.Position.X - 1, agent.Position.Y, agent.Position.Z)
	end
	
	-- function to move right
	local function right(agent)
		agent.Position = Vector3.new(agent.Position.X, agent.Position.Y,agent.Position.Z +1)
	end
	
	-- funtion to move left
	local function left(agent)
		agent.Position = Vector3.new(agent.Position.X, agent.Position.Y, agent.Position.Z - 1)
	end
	
	-- function to move up
	local function up(agent)
		agent.Position = Vector3.new(agent.Position.X, agent.Position.Y + 1, agent.Position.Z)
	end
	
	--function to move down
	local function down(agent)
		agent.Position = Vector3.new(agent.Position.X, agent.Position.Y - 1, agent.Position.Z)
	end
	
	
	-- function to calculate if closer or not
	local function closer(cLoc, goal, pLoc)
		-- get distances of old and new locations
		local oldDist = (pLoc - goal).magnitude
		local newDist = (cLoc - goal).magnitude
		
		-- check which one is smaller
		if newDist < oldDist then
			return true
		else
			return false
		end
	end
	
	-- function to test all moves
	local function move(agent, goal, pLoc, Nodes)
		if forward(agent) then
			if not closer(agent.Position, goal, pLoc) then
				agent.Position = pLoc
			else
				table.insert(Nodes, agent.Position)
				return
			end
		end
		if backward(agent) then
			if not closer(agent.Position, goal, pLoc) then
				agent.Position = pLoc
			else
				table.insert(Nodes, agent.Position)
				return
			end
		end
		if right(agent) then
			if not closer(agent.Position, goal, pLoc) then
				agent.Position = pLoc
			else
				table.insert(Nodes, agent.Position)
				return
			end
		end
		if left(agent) then
			if not closer(agent.Position, goal, pLoc) then
				agent.Position = pLoc
			else
				table.insert(Nodes, agent.Position)
				return
			end
		end
		if up(agent) then
			if not closer(agent.Position, goal, pLoc) then
				agent.Position = pLoc
			else
				table.insert(Nodes, agent.Position)
				return
			end
		end
		if down(agent) then
			if not closer(agent.Position, goal, pLoc) then
				agent.Position = pLoc
			else
				table.insert(Nodes, agent.Position)
				return
			end
		end
	end
	
	-- function to calculate path
	module.calculatePath =  function(pos, humanoid)
		print("Calculating Path")
		-- current location to know where the start position is for starting calculating
		local start = humanoid.Position
		
		-- waypoints
		local nodes = {}
		
		-- check if position is valid or not
		if pos.ClassName ~= Vector3 and pos.ClassName ~= "Part" then
			-- generate error and get out of function
			error("Position must be Vector3 or part")
			return
		end
		
		-- create goal position variable
		local goal
		
		-- just in case pos is a part
		if pos.ClassName == "Part" then
			goal = pos.Position
		else
			goal = pos
		end
		
		-- create an invisible agent to find path
		local agent = Instance.new("Part", workspace)
		-- properties of agent
		agent.Name = "Agent"
		agent.CanCollide = false
		agent.Transparency = 1
		agent.Anchored = true
		-- set position of agent
		agent.Position = start

		-- In case of exast
		coroutine.yield()
		
		-- loop to find path
		while true do
			-- get previous location
			local pLoc = agent.Position
			
			-- move agent
			move(agent, goal, pLoc, nodes)
			
			-- check if solution was found
			if agent.Position == goal then
				print("Path found")
				-- return waypoints
				return nodes
			end
		end
		-- no solution found
		error("No solution")
		return
	end

return module

and here is the module script being used

local AI = require(game.ServerScriptService.AI)

local goal = game.Workspace.Part

local path = AI.calculatePath(goal, script.Parent.HumanoidRootPart)

for node in path do
	script.Parent.Humanoid:MoveTo(node)
end

Whenever I run the code on a basic block rig it doesn't work. I tried setting the visibility of the agent to 0 to see what the agent is doing and the agent doesn't even move. Any ideas?