When attempting to access the UI for ONAP it redirects to the following two hostnames on certain actions:

portal.api.simpledemo.onap.org
sdc.api.simpledemo.onap.org

This means that unless these are defined on your local system the UI portal fails to work.

There may be other hosts that need defining as well for correct functionality, that is still to be determined.

The UI should not be redirecting client browsers to specific hostnames, instead if should leave the host / port portion of the URI alone.