I have downloaded and installed PostgreSQL 12 (64 bit) on a developer machine running Windows 10 Pro Education (64 bit).
When the installation came to the Stack Builder download application list step, an error occurred as follows:
A certification verification problem was encountered whilst accessing https://www.postgresql.org/applications-v2.xml schannel: next InitializeSecurityContext failed: Unknown error (0x80092013) - The revocation function was unable to check revocation because the revocation server was offline. This means that the source download cannot be verified. It is recommended that you do not continue with the download as it may be coming from a site that is pretending to be the intended download site and may contain viruses or malware.
Do you wish to continue?
I have tried to use Proxy servers referring to this answer. https://serverfault.com/questions/555125/postgresql-stack-builder-installation-proxy-setting-on-windows
I have also tried both solutions from that question. Still, I can not get the application list downloaded.
I want to install PostGIS. It seems the stack builder is safe and easy to use. What should I do to get the PostGIS installed?
Looks like https://www.postgresql.org/applications-v2.html link has some strong security. And it blocks some traffic. As @ay__ya has mentioned, in his case he made it work though VPN access. And in my case I was already behind the VPN and it was not working. So disabling VPN worked for me.