Not Compiling after March Update

The mod is not working since today's update, it is giving this error

Failed compiling 'NightZombies.cs':
1. 'Pool' does not contain a definition for 'GetList' [CS0117]
(NightZombies 49 line 400)

Replace the "GetRandomPlayer" function with this code:

private bool GetRandomPlayer(out BasePlayer player)
{
	List<BasePlayer> players = Pool.Get<List<BasePlayer>>();

	foreach (BasePlayer bplayer in BasePlayer.activePlayerList)
	{
		if (bplayer.IsFlying || _instance._vanish?.Call<bool>("IsInvisible", bplayer) == true)
			continue;
		players.Add(bplayer);
	}

	player = players.GetRandom();
	players.Clear();							   

	return player;
}