Why can't I teleport in my game? Teleport Service not working! Cannot find game server

I'm developing a ROBLOX game which heavily depends on teleporting (for matchmaking). But there's one problem. My lobby won't EVER teleport me to my game! It keeps on telling me:

Teleport failed because Cannot find game server (GameNotFound)

Does anyone know how to fix this? This is my code that handles teleporting:

LocalScript (On UI)

script.Parent.MouseButton1Click:Connect(function()

    --handler for gamemode
    local loadingScreenName = script.Parent.Parent.LoadingScreenName.Value

    local teleportArguments = {}

    --teleport to respective gamemode
    game:GetService("ReplicatedStorage").RemoteEvents.TeleportTo:FireServer(1799905865, 0, game.ReplicatedStorage.LoadingScreens.Solos:FindFirstChild(loadingScreenName))
end)

Server script (Actually teleports the player):

local rep = game:GetService("ReplicatedStorage")
local tpEvt = rep.RemoteEvents.TeleportTo

local TeleportService = game:GetService("TeleportService")
TeleportService.CustomizedTeleportUI = true

local function TeleportPlayerTo(player, placeId, teleportData, loadingScreen)
    if teleportData~=nil then
        if loadingScreen~=nil then
            TeleportService:Teleport(placeId, player, teleportData, loadingScreen)
        else
            TeleportService:Teleport(placeId, player, teleportData)
        end
    else
        if loadingScreen~=nil then
            TeleportService:Teleport(placeId, player, nil, loadingScreen)
        else
            TeleportService:Teleport(placeId, player)
        end
    end
end

TeleportService.TeleportInitFailed:Connect(function(plr, teleportResult, errorMessage)
    print(plr.Name.." failed to teleport.")
    print("Error: "..errorMessage)
end)

tpEvt.OnServerEvent:Connect(TeleportPlayerTo)