Upgrading LiveUpdate Administrator from a previous version, the LUA Apache service does not start.
During the upgrade a service.bat is run to uninstall the old service and install the new service.
If this fails, it is not logged, though it is evident if the Apache Tomcat Server version is not updated to the latest version. For example with LUA 2.3.9, this should be reflected as "Apache Tomcat 8.5.56 Server - https://tomcat.apache.org/" in the Description of the properties of the service.
From an elevated command prompt, go to C:\Program Files (x86)\Symantec\LiveUpdate Administrator\tomcat\bin and execute the following commands:
Then start the LUA Apache Tomcat service in services.msc