title: NET::ERR_CERT_COMMON_NAME_INVALID - Error Message
body: <p>I built a website some time ago with Flask. Now all of a sudden when I try to navigate there I get the following:</p>
  
  <p>NET::ERR_CERT_COMMON_NAME_INVALID</p>
  
  <p>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</p>
  
  <p>Does anyone know what's going on?</p>