[Koha] Error in Elasticsearch

After installed Elasticsearch and (at least) the following command: sudo koha-elasticsearch --rebuild -v -a -b library We have the following error: [27435] Checking state of biblios index [request] ** [http://locahost:9200]-[4000 [illegal_argument _exception].... Thanks P.S: We are new using ElasticSearch -- *Luis Moisés Rojas P.*