Kibana Elasticsearch TLS does not work (alert and actions)

Hi, I have the same problem as someone had by the topic:

Does it possible to investigate the reason why it doesn't work? Maybe some checklist or to run some command to identify which of the instruction point I don't implement?

I am not too sure what error you see but the thread you reference there is an error specifying that Kibana requires TLS communications to Elasticsearch to be able to use alert and actions ?

If so, you should verify elasticsearch http layer uses TLS per documentation - ie should be accessible via curl https://elasticsearch:9200 and not curl http://elasticsearch:9200.
Kibana documentation to also encrypt kibana http server is here

Hope this helps. If not please provide elasticsearch.yml and kibana.yml, along with the error you see