's'

app/[locale]/join/page.tsx

@@ -63,7 +63,7 @@ export default function JoinPage() {
   const checkAuth = useCallback(async () => {
     if (getStoredToken()) return true;
     try {
-      const res = await fetch("/api/auth/me");
+      const res = await fetch("/api/auth/me", { credentials: "include" });
       const data = await res.json();
       return !!(data?.user && data?.token);
     } catch {