Unable to connect to Elasticsearch. Error: Request Timeout after 30000ms

Elastic Stack Kibana
6

Configuration at Elasticsearch.yml is

# ======================== Elasticsearch Custom Configuration =========================


## Modify this and make it dynamic later##
cluster.name: "my-cluster"
network.host: 0.0.0.0
discovery.seed_hosts: []

## X-Pack settings
## see https://www.elastic.co/guide/en/elasticsearch/reference/current/setup-xpack.html
#
xpack.license.self_generated.type: trial
xpack.security.enabled: true
xpack.monitoring.collection.enabled: true

The only error at ElasticSearch end is:

[2020-05-05T11:03:51,163][WARN ][r.suppressed             ] [myserver] path: /.kibana, params: {index=.kibana}
org.elasticsearch.discovery.MasterNotDiscoveredException: null
	at org.elasticsearch.action.support.master.TransportMasterNodeAction$AsyncSingleAction$2.onTimeout(TransportMasterNodeAction.java:220) [elasticsearch-7.6.2.jar:7.6.2]
	at org.elasticsearch.cluster.ClusterStateObserver$ContextPreservingListener.onTimeout(ClusterStateObserver.java:325) [elasticsearch-7.6.2.jar:7.6.2]
	at org.elasticsearch.cluster.ClusterStateObserver$ObserverClusterStateListener.onTimeout(ClusterStateObserver.java:252) [elasticsearch-7.6.2.jar:7.6.2]
	at org.elasticsearch.cluster.service.ClusterApplierService$NotifyTimeout.run(ClusterApplierService.java:598) [elasticsearch-7.6.2.jar:7.6.2]
	at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:633) [elasticsearch-7.6.2.jar:7.6.2]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) [?:?]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) [?:?]
	at java.lang.Thread.run(Thread.java:830) [?:?]
[2020-05-05T11:03:51,167][WARN ][r.suppressed             ] [myserver] path: /.kibana_task_manager, params: {index=.kibana_task_manager}
org.elasticsearch.discovery.MasterNotDiscoveredException: null
	at org.elasticsearch.action.support.master.TransportMasterNodeAction$AsyncSingleAction$2.onTimeout(TransportMasterNodeAction.java:220) [elasticsearch-7.6.2.jar:7.6.2]
	at org.elasticsearch.cluster.ClusterStateObserver$ContextPreservingListener.onTimeout(ClusterStateObserver.java:325) [elasticsearch-7.6.2.jar:7.6.2]
	at org.elasticsearch.cluster.ClusterStateObserver$ObserverClusterStateListener.onTimeout(ClusterStateObserver.java:252) [elasticsearch-7.6.2.jar:7.6.2]
	at org.elasticsearch.cluster.service.ClusterApplierService$NotifyTimeout.run(ClusterApplierService.java:598) [elasticsearch-7.6.2.jar:7.6.2]
	at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:633) [elasticsearch-7.6.2.jar:7.6.2]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) [?:?]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) [?:?]
	at java.lang.Thread.run(Thread.java:830) [?:?]