I don't know how to fix this error. How do I fix it?

I made a script for my game, but I got an error. Also, every time when the round is over, I don't get spawned in the lobby. This is my script:

	--teleport plays back to lobby
	local lobbyspawns = {}
	for _, v in pairs(game.Workspace:WaitForChild("Lobby"):GetChildren()) do
		if v and v.Name == "SpawnLocation" then
			table.insert(lobbyspawns, v)
		end
	end
	for _, player in pairs(activecontestants) do
		if player then
			awardpoints(player, 1)
			if player.Character then
				local humanoid = player.Character:FindFirstChild("Humanoid")
				if humanoid then
					humanoid:UnequipTools()
				end
			end

			local randomspawn = lobbyspawns[math.random(1, #lobbyspawns)]
			player.Character:MoveTo(randomspawn.Position)

			local backpack = player:FindFirstChild("Backpack")
			if backpack then
				backpack:ClearAllChildren()
			end
		end
	end
	killer = nil
	sheriff = nil

This is the error (AGAIN)

10:48:41.721 - ServerScriptService.MainScript:458: bad argument #2 to 'random' (interval is empty)
10:48:41.723 - Script 'ServerScriptService.MainScript', Line 458
10:48:41.725 - Stack End