1st fix

index.js

@@ -249,6 +249,7 @@ client.on("ready", async function () {
     console.log("");
     console.log("Bot démarré".brightGreen);
 
+    var guild = client.guilds.cache.get(config.get("GUILD_ID"));
     var memberCount = guild.memberCount.toLocaleString();
     console.log('\n'+"Nous sommes "+memberCount+" membres.");
     client.user.setActivity("Regarde "+memberCount+" membres");