NET::ERR_CERT_COMMON_NAME_INVALID - Error Message
The error means: The host name you use in the web browser does not match the one used in the certificate.
If your server has multiple DNS entries you need to include all of into the certificate to be able to use them with https. If you access the server using it's IP address like https://10.1.2.3 then the IP address also have to present in the certificate (of course this only makes sense if you have a static IP address that never changes).
I built a website some time ago with Flask. Now all of a sudden when I try to navigate there I get the following:
NET::ERR_CERT_COMMON_NAME_INVALID
Your connection is not private
Attackers might be trying to steal your information from www.mysite.org (for example, passwords, messages, or credit cards). Learn more
Does anyone know what's going on?