Issue with ES v6.8.2 and Kibana v6.8.2

[Anand_Totala]

I am using Es v6.8.2 and kibana v 6.8.2.
{"type":"log","@timestamp":"2019-08-16T18:05:53Z","tags":["warning","task_manager"],"pid":1,"message":"PollError [security_exception] failed to authenticate user [kibana], with { header={ WWW-Authenticate="Basic realm="security" charset="UTF-8"" } }"}

I am getting above error message in kibana logs continuosly.

my elasticserch.yml
cluster.name: "docker-cluster"
network.host: 0.0.0.0
xpack.security.enabled: true

I dont know what is wrong here, passowrd are right verified from API, then too it is giving this error.

[Larry_Gregory]

Hi @Anand_Totala,

You verified the credentials listed in your kibana.yml's elasticsearch.username and elasticsearch.password fields?

Please post your entire elasticsearch.yml and kibana.yml configuration, redacting any sensitive information such as passwords.

Also, please post your full kibana log file as well.