We have freshly installed the Administrative UI for the 12.8 PS.
Installation is completed with any errors.
When we were registering the Admin UI to the PS using below command we were getting error.
XPSRegClient siteminder -adminui-setup
[XPSRegClient - XPS Version 12.8.0400.2278]
Log output: /smapp/CA/siteminder/log/XPSRegClient.2020-08-04_065427.log
Initializing system, please wait...
Validating client name, please wait...
(FATAL) : [sm-xpsxps-04670] Invalid administrator credentials.
Note: there is no smreg file present in the $siteminderhome/bin folder.
Release : 12.8
Component : SITEMINDER -WEB AGENT FOR APACHE
Customer had not imported the key objects hence we were getting the error.
After customer imported the key objects it worked as expected and they were able to register.