Hi @Heythem_DHAOUADI If you enabled https on elasticsearch I think that should be
elasticsearch.hosts: ["https://192.168.188.134:9200"]
Did you enable authentication? if you you will need to also add the elasticsearch username and password.
You should also look at the actual kibana logs to see more detail... not just systemctl status you might need to enable logging to that if this does not work... or use journalctl