Possible cause
Security settings in your browser or firewall may block access to the Administration Web Interface.
Solution
Add the Administration Web Interface location to the Trusted Sites list or add an exception to an access rule in the browser and/or firewall security settings.
For example, it is possible to run into a "Certificate Error" or "Certificate Invalid" warning message when accessing an SSL-secured Administration Web Interface using Internet Explorer. When this occurs, manually import the Administration Web Interface certificate into the browser's Root Trusted CA first.
For more information about encrypted communication, see TLS/SSL-secured Administration Web Interface.