Please verify if the rtmhs service is running with the following command:
service rtmhs status
If the service is not running you can browse the rtmhs.log for more details:
tail -f /usr/adlex/log/rtmhs.log
If the indication given in the log is not clear enough you should consider opening a support ticket.
Note: DC RUM and ESM release 12.4 is no longer supported, effective July 1, 2018