net::ERR_CERT_AUTHORITY_INVALID

If you encounter the following error with a self-signed certificate in Google Chrome:

Certificate Error
There are issues with the site's certificate chain (net::ERR_CERT_AUTHORITY_INVALID).

do the following instructions:

Click broken lock icon and then click `Certificate information`.

Export it to a file.

Settings -> Show advanced settings... -> Manage certificates...

Add the certificate as a trusted root CA.

Select `Exit`. (Note this is a key part to apply the change.)