Problems with the Bitwarden app

Good evening,
I have successfully installed Vaultwarden on my Raspberry Pi and I used Nginx as reverse proxy; I can access from home and use a certificate generated with Let’s Encrypt for secure connection. From the PC I can access without problems, while on my iOS device I receive an error message, which informs me that it has found no account. How can I solve? Thanks in advance.

Please read: Connect Clients to your Instance | Bitwarden Help & Support

Hello and thanks for the reply. I apologize for not having read the documentation. Good day.