I'm not sure what your question is about here?

The warning is because you use the default of SSL_verify_mode, which is SSL_VERIFY_NONE. This default is deprecated because it leads to a sense of false security as it allows easy man-in-the-middle (MITM) attacks.

The error you are getting is likely unrelated to that warning. It means that you can't connect to the host. Maybe there is a proxy between the two machines? Maybe you need to set up $ENV{HTTPS_PROXY} properly.

As you don't show the relevant code, it's hard to advise further.