Fresh ES + Kibana 500 Error

Hi There,

I’m new here, I just intalled ES with Kibana as per instructed in documentation. This installation is done and opened kibana at http://localhost:5601 which is also fine but when I’m trying to login with the credential, it’s saying me An error occurred while checking your credentials, make sure you have an Elasticsearch cluster secured by Security running..
But Network tab of browser[Inspect] saying me 500 Internal error.

My version of ES and Kibana are same with 6.7.1, Can anybody pull up me from this? Thanks.