Not able to open Kibana


I am trying to open kibana but it is showing:
"Login is currently disabled. Administrators should consult the Kibana logs for more details."

Below are the logs I found.
I am running my ES on clustered env.

[2018-03-28T07:16:10,323][WARN ][org.elasticsearch.cluster.action.shard.ShardStateAction] [.monitoring-kibana-6-2018.03.27][0] received shard failed for shard id [[.monitoring-kibana-6-2018.03.27][0]], allocation id [UUdYwv1GT2KpjldsIzpRgg], primary term [1], message [failed to perform indices:data/write/bulk[s] on replica [.monitoring-kibana-6-2018.03.27][0], node[3B9qU_3hTWevdYWuweGY1Q], [R], s[STARTED], a[id=UUdYwv1GT2KpjldsIzpRgg]], failure [NodeDisconnectedException[[][indices:data/write/bulk[s][r]] disconnected]] org.elasticsearch.transport.NodeDisconnectedException: [instance-0000000002][][indices:data/write/bulk[s][r]] disconnected

Please help me resolving the issue.

Youve provided messages from the Elasticsearch log. What does the Kibana log say?

Hi @TimV, hw to get kibana logs? I am using Elastic cloud.

I have restarted the cluster and I am able to use Kibana now.