Facing org.elasticsearch.discovery.MasterNotDiscoveredException: waited for [30s] issue while connecting Elastic Search

Hi Team,
I am installing below Elastic Search Plugin with camunda 7.9.0 and tomcat sever.
https://github.com/camunda-community-hub/camunda-bpm-elasticsearch

I have configured the Elastic Search server in local with below details:
Host : localhsot
Port : 9200

Response :
{

  • “name” : “DESKTOP-9ATM7SF”,*
  • “cluster_name” : “camunda_bpm_es_cluster”,*
  • “cluster_uuid” : “aa3XBsFuSEKehIr07svXDQ”,*
  • “version” : {*
  • “number” : “7.15.1”,*
  • “build_flavor” : “default”,*
  • “build_type” : “zip”,*
  • “build_hash” : “83c34f456ae29d60e94d886e455e6a3409bba9ed”,*
  • “build_date” : “2021-10-07T21:56:19.031608185Z”,*
  • “build_snapshot” : false,*
  • “lucene_version” : “8.9.0”,*
  • “minimum_wire_compatibility_version” : “6.8.0”,*
  • “minimum_index_compatibility_version” : “6.0.0-beta1”*
  • },*
  • “tagline” : “You Know, for Search”*
    }

But I am facing below issue while checking the index if exists code for the plugin:
Caused by: org.elasticsearch.discovery.MasterNotDiscoveredException: waited for [30s].

Below are the configuration in the plugin:
Elastic Search Cluster Name : camunda_bpm_es_cluster
Elastic Search Is Transport Cline : false
Elastic Search Is ESHost : localhost
Elastic Search Is ESPort : 9200
Elastic Search Is Index : camundabpm

(Note : we are using Camunda 7.9.0 and Elastic Search Server version 7.15.1)
If it is version mismatch issue please do tell which Elastic Search Server version I am suppose to use.
Can you please help?