How to resolve the SSL error with local copy of site on Dev Desktop?
DevDestop now supports this.
https://docs.acquia.com/dev-desktop2/sites

Acquia Dev Desktop now provides simulated HTTPS support using a self-signed SSL certificate, which supports local testing and development of websites that rely on SSL. Learn more.

Just download a new version of DevDesktop. I'm currently on Version 2, Control panel rev: 032976b and have it working with sites that use SSL.