After making a config change to the standaline-full.xml, the Admin UI service failed to start.
This was a coincidence not related to the configuration change. An instance of the Admin UI service was already running, preventing a second instance from binding to the ports.
Release: MSPSSO99000-12.8-Single Sign-On-for Business Users-MSP
Make sure all java processes related to the Admin UI path are shut down before starting the service.