parsing failed [TypeError: Network request failed] Expo

Hi guys,

I have made some little app that should read Barcodes and send the data via API.

handleBarCodeScanned = ({ type, data }) => {

    alert(`Bar code with type ${type} and data ${data} has been scanned! and the phone is ${this.state.maci`);

    var BarCodeScannedInApp = 'http://localhost:50474/api/ScanPart?PartBarCode=' + data + "&StationName=" + this.state.maci;
      .then(response => response.json())
    .catch(error => console.log('parsing failed', error))

When the code trying to execute the Fetch it’s throwing an exception “parsing failed [TypeError: Network request failed]


  "expo": {
    "name": "my-test-scan",
    "slug": "my-test-scan",
    "privacy": "public",
    "sdkVersion": "33.0.0",
    "platforms": [
    "version": "1.0.0",
    "orientation": "portrait",
    "icon": "./assets/icon.png",
    "splash": {
      "image": "./assets/splash.png",
      "resizeMode": "contain",
      "backgroundColor": "#ffffff"
    "updates": {
      "fallbackToCacheTimeout": 0
    "assetBundlePatterns": [
    "ios": {
      "supportsTablet": true

Any suggestions on how to fix this issue?

  • tried to change the LocalHost to my IP with no luck.

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