We upgraded our elastic stack to logstash, Elasticsearch and kibana from version 7.6.1 to 7.15.2 respectively.
But we get Kibana server is not ready yet error in kibana interface.
kibana service is running but there is a keystore depreciated error.
I have closed xpack now because it may be due to this error.
But the error still persists.
Also cluster status red. But nodes are running.
There are these errors in the kibana.log file.
Is there anyone who can help?