Who can save me TypeError: Failed to fetch

Elastic Stack Kibana
1

I use docker to install ES and Kibana, ES can be accessed normally，

{
  "name" : "5f6114f4c963",
  "cluster_name" : "docker-cluster",
  "cluster_uuid" : "e9a2-N-rRMmq_cpiaJqnBw",
  "version" : {
    "number" : "7.10.1",
    "build_flavor" : "default",
    "build_type" : "docker",
    "build_hash" : "1c34507e66d7db1211f66f3513706fdf548736aa",
    "build_date" : "2020-12-05T01:00:33.671820Z",
    "build_snapshot" : false,
    "lucene_version" : "8.7.0",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}

but I get an error message when accessing Kibana，help！ :smiling_face_with_tear: :smiling_face_with_tear: :smiling_face_with_tear:

Version: 7.10.1
Build: 36063
TypeError: Failed to fetch
    at Fetch._callee3$ (http://159.75.71.68:5601/36063/bundles/core/core.entry.js:6:58583)
    at l (http://159.75.71.68:5601/36063/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:380:1740520)
    at Generator._invoke (http://159.75.71.68:5601/36063/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:380:1740273)
    at forEach.e.<computed> [as throw] (http://159.75.71.68:5601/36063/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:380:1740877)
    at fetch_asyncGeneratorStep (http://159.75.71.68:5601/36063/bundles/core/core.entry.js:6:52652)
    at _throw (http://159.75.71.68:5601/36063/bundles/core/core.entry.js:6:53060)

docker network create --subnet=172.10.0.0/16 elk

docker run -d --name es --net elk -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" --privileged=true -v $PWD/elasticsearch/elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml -v $PWD/elasticsearch/data/:/usr/share/elasticsearch/data elasticsearch:7.10.1

docker run -d --name kibana -p 5601:5601 -v $PWD/kibana/kibana.yml:/usr/share/kibana/config/kibana.yml --net elk --privileged=true kibana:7.10.1

Comes with two YML configuration files：es and kibana

# es configuration
cluster.name: "docker-cluster"
network.host: 0.0.0.0

# kibana
# ** THIS IS AN AUTO-GENERATED FILE **
#
 
# Default Kibana configuration for docker target
server.name: kibana
server.host: "0"
# elasticsearch 地址
elasticsearch.hosts: [ "http://172.10.0.2:9200" ]
monitoring.ui.container.elasticsearch.enabled: true
# i18n.locale: zh-CN
2

First upgrade to at least 7.17 or better 8.15.0. It's useless to start a project/cluster with a non supported version which has not been patched with security fixes and bug fixes.