my problem:
my yml:
server.port: 5601
server.name: "kibana"
server.host: "0.0.0.0"
elasticsearch.hosts: ["http://192.168.8.142:9200", "http://192.168.8.143:9200", "http://192.168.8.144:9200"]
kibana.index: ".kibana_coa"
elasticsearch.requestTimeout: 80000
server.maxPayloadBytes: 31457280
xpack.encryptedSavedObjects.encryptionKey: "987f78e5d0a8c4109137c1ac5a41dktr"
xpack.reporting.encryptionKey: "ml2mmX2pMZUsPLoqmUpCpacWSVzF2xHC8TYCzs0A"
xpack.reporting.csv.maxSizeBytes: 104857600
xpack.reporting.csv.scroll.size: 10000000
xpack.reporting.csv.enablePanelActionDownload: true
i18n.locale: "zh-CN"
my kibana version is : 7.9.2
thanks everyone~