Kibana service unable to start with no any specific errors

[bth-s3]

Cassandra keyspaces and Elasticsearch indices was perfectly connected to all the nodes also the status of the cluster is green.
After start the service, kibana asked to drop the index .kibana1 and restart, done with no change.

System information:

OS: Ubuntu 18.04.4 LTS
Kernel version: 4.15.0-99-generic
Elassandra version: elassandra_6.8.4.10_all.deb
Kibana version: kibana-oss-6.8.4-amd64.deb (Kibana package without x-pack installed)
Cassandra topology: single datacenter with 3 nodes, Kibana installed in one of them
Elasticsearch version: Elasticsearch 6.8.4

{
  "name": xxx
  "cluster_name" : "Test Cluster",
  "cluster_uuid" : "73Elasticsearch version:626017-3b3d-4989-a54a-3b045f245934",
  "version" : {
    "number" : "6.8.4",
    "build_flavor" : "oss",
    "build_type" : "deb",
    "build_hash" : "145cd75",
    "build_date" : "2020-08-15T15:28:44.339167Z",
    "build_snapshot" : false,
    "lucene_version" : "7.7.2",
    "minimum_wire_compatibility_version" : "5.6.0",
    "minimum_index_compatibility_version" : "5.0.0"
  },
  "tagline" : "You Know, for Search"
}

Cassandra.yml
endpoint_snitch: GossipingPropertyFileSnitch

Kibana log:

tail -n 10 /var/log/kibana/system.log 
{"type":"log","@timestamp":"2020-09-14T08:16:42Z","tags":["debug","legacy-proxy"],"pid":21416,"message":"Event is being forwarded: connection"}
{"type":"log","@timestamp":"2020-09-14T08:16:42Z","tags":["debug","legacy-service"],"pid":21416,"message":"Kibana server is not ready yet GET:/."}
{"type":"log","@timestamp":"2020-09-14T08:16:42Z","tags":["debug","legacy-proxy"],"pid":21416,"message":"Event is being forwarded: connection"}
{"type":"log","@timestamp":"2020-09-14T08:16:43Z","tags":["debug","legacy-proxy"],"pid":21416,"message":"Event is being forwarded: connection"}
{"type":"log","@timestamp":"2020-09-14T08:16:43Z","tags":["debug","legacy-service"],"pid":21416,"message":"Kibana server is not ready yet GET:/favicon.ico."}
{"type":"log","@timestamp":"2020-09-14T08:16:44Z","tags":["plugin","debug"],"pid":21416,"message":"Checking Elasticsearch version"}
{"type":"log","@timestamp":"2020-09-14T08:16:44Z","tags":["debug","legacy-proxy"],"pid":21416,"message":"\"getConnections\" has been called."}
{"type":"log","@timestamp":"2020-09-14T08:16:47Z","tags":["plugin","debug"],"pid":21416,"message":"Checking Elasticsearch version"}
{"type":"log","@timestamp":"2020-09-14T08:16:49Z","tags":["debug","legacy-proxy"],"pid":21416,"message":"\"getConnections\" has been called."}
{"type":"log","@timestamp":"2020-09-14T08:16:49Z","tags":["plugin","debug"],"pid":21416,"message":"Checking Elasticsearch version"}

I've checked for the matched version of Elasticsearch, Kibana and Ubuntu 18.04

[bth-s3]

more information,

with all these three servers
I've downgraded Ubuntu to 16.04 and installed Elassandra 6.2.3.31 and Kibana 6.2.3

Now, it's working