Business One - Iphone

I have a question, I recently saw that an update was made for Business One on Android, everything is fine on this side as I have successfully configured 4 devices. However, on iPhone, the version with the old icon persists, and I haven't been able to set up the application on two devices despite installing the certificate and configuring the phone correctly. When entering the user credentials, it gives me an error message: 'The certificate for this server was not issued by a trusted certification authority.'