Teleport script error 15:48:32.375 - Teleport is not a valid member of TweenService?

That's because you cannot tween a function like teleportservice to a tween event to fix this simply type the below code:S

local Players = game:GetService("Players")
local TeleportService = game:GetService("TeleportService")
 
local placeId = 0 -- replace here
local userId = 1 -- replace with player's userId
 
-- find the player
local player = Players:GetPlayerByUserId(userId)
 
-- teleport the player
TeleportService:Teleport(placeId, player)

If you want to make it when a player touched do this:

local TeleportService = game:GetService("TeleportService")
 
local placeID_1 = 408502340
local placeID_2 = 408502380
 
local function onPartTouch(otherPart)
	local player = game.Players:GetPlayerFromCharacter(otherPart.Parent)
	if player then
		TeleportService:Teleport(placeID_1, player)
	end
end
script.Parent.Touched:Connect(onPartTouch)