Cannot connect to Elasticsearch
From Kolmisoft Wiki
Make sure your server has at least 4GB of RAM, then restart elasticsearch service:
service elasticsearch restart
then logout and re-login to MOR GUI.
Server with < 4GB RAM
USE IT AT YOUR OWN RISK!
Run this script: /usr/src/mor/sh_scripts/elasticsearch/es_low_ram_fix.sh
then logout and re-login to MOR GUI.