My back-end is an ASP.NET Web API server hosted as a secure server with a certificate. When I navigate to the URL, it is secure. This part looks good. However, when I FTP my browser app (Flutter or another framework like Angular or React) to the same server and navigate to myflutterapp.xxx, the Flutter app looks great and works as designed but is marked as insecure by Chrome. How many certificates do I need for this setup? Possible answers: 1. I do not need the certificate on the server app, only the Flutter app. 2. I need both certificates.