Getting this?

This site is not secure

This might mean that someone’s trying to fool you or steal any info you send to the server. You should close this site immediately

For regular web traffic, this is a valid warning message.  And you should be wary of sites that don't have valid certificates.  It's inadvisable to purchase anything from sites that don't conform to the expected security standards to keep your money safe.  Simply leave the site. 

However, when running a home-based HTTPS server, this can get annoying.  The site is known.  It's yours.  So why not just trust it and avoid the hassle. Despite IE giving the option to trust a set of sites by adding them to the trusted site's panel in internet options, that still will not work fully.  However, if you plan to use IE only for your local development work, then the steps below are fine. In this case, updates IE settings by:

1. Click the IE Settings (Cog Wheel) at the top right corner of your IE browser.
2. Select Internet Options
3. Uncheck: Warn about certificate address mismatch
4. Uncheck: Check for publisher's certificate revocation
5. Uncheck: Check for server certificate revocation*
6. Uncheck: Check for signatures on downloaded programs

Apply and save the settings.  Restart Internet Explorer.  The warning should now go away. 

Cheers,
TK