The Admin Console URL is opening the Redhat apache test page instead of the Admin Console or UIM home page:
Release : 8.51
Component : UIM - UMP_ADMINCONSOLE2: 8.51
On the primary hub, change the http port in the wasp probe's Configure GUI to use a port not already in use (for example, 8080).
Apply the change and restart the wasp probe.
Include the new http port in the URL to open the Admin Console: http://<IP address of primary hub>:8080/adminconsoleapp