Could Not index event to ElasticSearch

"name" : "node-1",
"cluster_name" : "elasticsearch",
"cluster_uuid" : "HgSWRRDZR76gW2a6NJjANg",
"version" : {
"number" : "7.5.1",
"build_flavor" : "default",
"build_type" : "deb",
"build_hash" : "3ae9ac9a93c95bd0cdc054951cf95d88e1e18d96",
"build_date" : "2019-12-16T22:57:37.835892Z",
"build_snapshot" : false,
"lucene_version" : "8.3.0",
"minimum_wire_compatibility_version" : "6.8.0",
"minimum_index_compatibility_version" : "6.0.0-beta1"
},
"tagline" : "You Know, for Search"

thoughts, does Elasticsearch look ok?