Http GET/POST request error ionic 3

Ionic Framework ionic-v3
1

Hello,

Am facing some issues on http request on real device

Calling function:

public makeGetRequest() {
    return new Promise(resolve => {
      //http://abc.xyz.com:8764/myapp/getItems
      this.http.get('http://httpbin.org/get').subscribe(data => {
        console.log("\n\n\nGet Method Success: " + JSON.stringify(data) + "\n\n\n\n");
        resolve(data);
      }, err => {
        console.log("\n\n\nGet Method Error: " + JSON.stringify(err) + "\n\n\n\n\n");
      });
    });
  }

When accessing http://httpbin.org/get, i get below response:

{
    "firstName": "John",
    "lastName": "Smith",
    "gender": "man",
    "age": 32,
    "address": {
        "streetAddress": "21 2nd Street",
        "city": "New York",
        "state": "NY",
        "postalCode": "10021"
    },
    "phoneNumbers": [
        { "type": "home", "number": "212 555-1234" },
        { "type": "fax", "number": "646 555-4567" }
    ]
}

When accessing http://abc.xyz.com:8764/myapp/getItems, i get below error:

{
  "headers": {
    "normalizedNames": {
      
    },
    "lazyUpdate": null
  },
  "status": 404,
  "statusText": "Not Found",
  "url": "http://localhost:8080/http://abc.xyz.com:8764/myapp/getItems”,”ok": false,
  "name": "HttpErrorResponse",
  "message": "Http failure response for http://localhost:8080/http://vs2.paramatrix.com:8764/pace/heartbeat: 404 Not Found",
  "error": null
}

Ionic info:

cli packages: (/usr/local/lib/node_modules)

@ionic/cli-utils  : 1.19.0
ionic (Ionic CLI) : 3.19.0

global packages:

cordova (Cordova CLI) : Update notifier was not able to access the config file. You may grant permissions to the file: 'sudo chmod 744 ~/.config/configstore/update-notifier-cordova.json' 7.1.0

local packages:

@ionic/app-scripts : 3.1.8
Cordova Platforms  : Update notifier was not able to access the config file. You may grant permissions to the file: 'sudo chmod 744 ~/.config/configstore/update-notifier-cordova.json'  android 6.3.0 ios 4.5.4
Ionic Framework    : ionic-angular 3.9.2

System:

ios-deploy : 1.9.2
Node       : v8.9.1
npm        : 5.5.1
OS         : macOS Sierra
Xcode      : Xcode 9.2 Build version 9C40b

Environment Variables:

ANDROID_HOME : /Users/Administratoe/Library/Android/sdk

Misc:

backend : pro

ionic.config.json

{
  "name": "eppm",
  "app_id": "",
  "type": "ionic-angular",
  "integrations": {
    "cordova": {}
  },
  "proxies": [
    {
      "path": "/pace",
      "proxyUrl": "http://abc.xyz.com:8764/myapp"
    }
  ]
}

Please help me to figure it out.