How would I fix a script that errors as Unable to cast Instance to int?

local Player= game.Players.LocalPlayer
local Cam = workspace.CurrentCamera
local TeleportService = game:GetService("TeleportService")
local Mouse=Player:GetMouse()
Mouse.Button2Down:connect(function()
    if Cam.CameraSubject== workspace.Yellow then
    TeleportService:Teleport(Player,184968122)
    elseif Cam.CameraSubject==workspace.Green then
        TeleportService:Teleport(Player,182114422)
    end
end)

I doubt this should work on play solo mode so I tried it on a normal server and it just errors as "Unable to cast Instance to int". This is in a localscript inside of StarterGui(I feel kind of bad asking since I feel like its an obvious mistake, and yes, this is my first time trying to use TeleportService)