Using Flywheel LOCAL for single site development. Site has been throwing curl error 60 messages which led me down this path. With my site still in temporary status on FW, it always gave an invalid cert error browsing to the temp site. Given that my site is not in production yet, I decided to do it later.
However, I had to take one last swing at it so I downloaded a new ca-bundle.crt file from:
Renamed the existing .crt file to .old and copied new .crt to:
R-click to install new certs. Opened FW LOCAL and pushed site to FW. Now temp site shows secured.
Don’t know how this will work for y’all but given lack of solutions here, thought this might help someone.