Go into the Admin portal and under the CATALOG tab, select the SETTINGS tab then select the NEW END USER PORTAL UI section. Check to see if the ENABLE NEW PORTAL UI button is active. If so, click it.
This setting is stored in the DB. When cloning, it can get reset.
NOTE: To get logged in as an appliance admin, browse to "https://<FQDN>/SAAS/login/0" and use your local admin account. This will bypass all policies and authenticators.