certificate for this server is invalid

Question

My app is live. It was working fine. But somedays before we changed the certificates(for security purpose) on Server. And Now whenever I tried to run my app. It is giving

Answer 1

You can check to see if this is a server-side problem by testing the TLS endpoint using SSL Labs (assuming this is an HTTPS connection). If the results come back invalid, the site will tell you why. If you're using a self-signed certificate, that would certainly cause this error.

If the results come back as valid from SSL Labs, then it's probably on the client side. Some client software doesn't have built-in trusted root certificates, but I doubt that Swift doesn't use the default OS root certificate store.

Answer 2

Remove https://www from ServerTrustPolicy and put just url

Answer 3

Please also check your firewall restrictions. In my case, this error occurred due to my firewall blocked the required URL. it's worked fine after removing firewall restrictions

Answer 4

Solved same issue with just setting devices' date & time to automatic.