need help for code

[lilac oracle]

for (Player player1 : Server.getInstance().getOnlinePlayers().values()){
                String message = langues.getInstance().langage(player1, 0);
                player1.sendMessage(message);
            }

Impossible de transmettre l'événement "cn.nukkit.event.player.PlayerJoinEvent" à "CoreSysteme v1.0.0" : Cannot invoke "vanilla.langues.langage(cn.nukkit.Player, int)" because the return value of "vanilla.langues.getInstance()" is null sur vanilla.events.Join
java.lang.NullPointerException: Cannot invoke "vanilla.langues.langage(cn.nukkit.Player, int)" because the return value of "vanilla.langues.getInstance()" is null

[fiery pewter]

Your variable instant has no value. You need to initiate it first:

instant = new langues();