App Bitwarden android non funziona

[fiorenzopiras-web]

Salve a tutti i componenti del forum, sono nuovo e ho un problema con l'app Bitwarden su un telefono android moto. Non vengono riconosciute le credenziali d'accesso vaultwarden dietro server proxy nginx con certificati Let's Encrypt configurato su server CasaOS. Funziona correttamente da web compresa l'estenzione su Chrome. Non funziona sul telefono. Questo è il messaggio d'errore che compare:
Stacktrace:
java.net.UnknownHostException: Unable to resolve host "vaultwarden.fiopi.duckdns.org": No address associated with hostname
java.net.Inet6AddressImpl.lookupHostByName(Inet6AddressImpl.java:156)
java.net.Inet6AddressImpl.lookupAllHostAddr(Inet6AddressImpl.java:103)
java.net.InetAddress.getAllByName(InetAddress.java:1152)
Bd.t.a(Unknown Source:294)
Bd.t.f(Unknown Source:154)
Bd.l.d(Unknown Source:9)
Bd.l.a(Unknown Source:61)
Bd.b.intercept(Unknown Source:23)
Cd.g.b(Unknown Source:127)
Cd.b.intercept(Unknown Source:607)
Cd.g.b(Unknown Source:127)
Cd.a.intercept(Unknown Source:540)
Cd.g.b(Unknown Source:127)
Cd.a.intercept(Unknown Source:198)
Cd.g.b(Unknown Source:127)
Nd.b.intercept(Unknown Source:553)
Cd.g.b(Unknown Source:127)
com.bitwarden.network.interceptor.BaseUrlInterceptor.intercept(Unknown Source:42)
Cd.g.b(Unknown Source:127)
com.bitwarden.network.interceptor.HeadersInterceptor.intercept(Unknown Source:46)
Cd.g.b(Unknown Source:127)
Bd.q.d(Unknown Source:89)
Bd.n.run(Unknown Source:47)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1156)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:651)
java.lang.Thread.run(Thread.java:1119)

Version: 2025.7.2 (20551)
Device: 📱 motorola moto g73 5G 🤖 14@34 📦 prod
CI: 🧱 commit: bitwarden/android@277fcbf
💻 build source: bitwarden/android/actions/runs/16758228945/attempts/1
Qualcuno può aiutarmi? Grazie.
Fiorenzo