Kibana unable to retrieve version information from Elasticsearch nodes

Hello! Continuing the topic Failed to establish trust communication between es01, es02 and kibana I set just the intermediate certificate in kibana part of the configuration:

ELASTICSEARCH_SSL_CERTIFICATEAUTHORITIES: $CERTS_DIR/Sub2_CA_2012.cer

and get such error:

2021-07-08T06:36:18.170439168Z {"type":"log","@timestamp":"2021-07-08T06:36:18+00:00","tags":["error","savedobjects-service"],"pid":953,"message":"Unable to retrieve version information from Elasticsearch nodes."}

So kibana container is up, but service is unavailable:

Kibana server is not ready yet

Thanks for any help.

@jportner could you provide some help here please?