We have a new installation of NPM12 secured with SSL, however, it only works in Chrome.
When accessing with FireFox or Safari, I get the following error "Secure Connection Failed The connection to the server was reset while the page was loading. The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. Please contact the website owners to inform them of this problem."
Any interesting logs in your inetpub folder?