Locate the section "default_modules".  Insert the section below:

{
                "name": "com.phenixidentity~phenix-httpclient-mod",
                "scope": "global",
                "singleton": "true",
                "config": {
                    "_proxy": "",
                    "ssl_tls_version": "TLSv1.2",
                    "ssl_trust_all": "false",
                    "_ssl_keystore_ref": "",
                    "_ssl_truststore_ref": "",
                    "request_timeout": "2000",
                    "connect_timeout": "-1",
                    "socket_timeout": "-1",
                    "allow_redirect": "false",
                    "allow_relative_redirect": "false",
                    "max_redirects": "0",
                    "request_body_max_size": "2097152",
                    "response_body_max_size": "2097152"
                }
}

See attached reference file  for detailed view.

On the "ADVANCED" tab, locate the section "MODULES". 

Insert the section below:

{
    "name" : "com.phenixidentity~phenix-httpclient-mod",
    "scope" : "global",
    "singleton" : "true",
    "config" : {
      "_proxy" : "",
      "ssl_tls_version" : "TLSv1.2",
      "ssl_trust_all" : "false",
      "_ssl_keystore_ref" : "",
      "_ssl_truststore_ref" : "",
      "request_timeout" : "2000",
      "connect_timeout" : "-1",
      "socket_timeout" : "-1",
      "allow_redirect" : "false",
      "allow_relative_redirect" : "false",
      "max_redirects" : "0",
      "request_body_max_size" : "2097152",
      "response_body_max_size" : "2097152"
    },
    "enabled" : "true",
    "created" : "2020-11-24 11:17:56.988",
    "id" : "84d7028c-9174-459d-8eeb-c6fed70d77ab"
  }

Locate the section "NODE_GROUPS". 

Locate the "node group" with the name "default" ( "name" : "default").

In the "module_refs" parameter, add the id if the newly added module, 84d7028c-9174-459d-8eeb-c6fed70d77ab.

Example:

 {
    "name" : "default",
    "description" : "Default node group (created automatically) - all nodes belong to this group",
    "config" : {
      "module_refs" : "84d7028c-9174-459d-8eeb-c6fed70d77ab"
    },
    "created" : "2020-11-24 11:17:57.007",
    "id" : "7dda2447-2f86-4743-88ba-3ce65bd984fa",
    "modified" : "2020-11-24 11:17:57.017"
  }