Javascript 反应本机：类型错误：网络请求失败

我在Android应用程序中注册时遇到问题

static creaUtente(identity, FirstName, LastName, FiscalCode , Email) {
        let formdata = new FormData();
        formdata.append('Identity', identity);
        formdata.append('FirstName', FirstName);
        formdata.append('LastName', LastName);
        formdata.append('FiscalCode', FiscalCode);
        formdata.append('Email', Email);

        console.log(Configuration.base_url.rest + Configuration.apiRoutes.signUp)
        console.log(formdata)

        return new Promise((resolve, reject)=> {
            fetch(Configuration.base_url.rest + Configuration.apiRoutes.signUp,{
                method: 'POST',
                headers: {
                    'Content-Type': 'multipart/form-data',
                },
                body: formdata
            })
            .then((response) => response.json())
            .then((responseData) => {
                if(responseData.Error){
                    Alert.alert("Errore");
                }
                global.utente = responseData;
                resolve(responseData)
            })
            .catch((err) => {reject(err)})
        })
    }

这是我使用的代码，在获取中我传递了一个指向我的API的链接（工作正常。这是一个https链接）

但当我尝试注册我的应用程序时，我收到以下错误：

例如，我收到的是日志

[“身份”， {ProjectName:{用户名：'TNNFRZ77H01G273V'，密码：'12345'}}]， ['FirstName'，'Fabrizio']， ['LastName'，'tono']， ['FiscalCode'、'TNNFRZ77H01G273V']、['Email'、'Fabrizio。tonno@email.com']]}{[TypeError:网络请求 失败]

我不知道我能做什么：（ 你能帮我吗

使用Chrome的debbuger：

TypeError: Network request failed
at XMLHttpRequest.xhr.onerror (whatwg-fetch.js:504)
at XMLHttpRequest.dispatchEvent (event-target.js:172)
at XMLHttpRequest.setReadyState (XMLHttpRequest.js:580)
at XMLHttpRequest.__didCompleteResponse (XMLHttpRequest.js:394)
at XMLHttpRequest.js:507
at RCTDeviceEventEmitter.emit (EventEmitter.js:181)
at MessageQueue.__callFunction (MessageQueue.js:366)
at MessageQueue.js:106
at MessageQueue.__guard (MessageQueue.js:314)
at MessageQueue.callFunctionReturnFlushedQueue (MessageQueue.js:105)

package.json

    dependencies": {
    "@react-native-community/async-storage": "^1.4.2",
    "buffer": "^5.2.1",
    "pouchdb-adapter-asyncstorage": "^6.4.1",
    "pouchdb-authentication": "^1.1.3",
    "pouchdb-find": "^7.0.0",
    "pouchdb-react-native": "^6.4.1",
    "react": "16.8.3",
    "react-native": "0.59.4",
    "react-native-ble-manager": "^6.6.2",
    "react-native-ble-plx": "^1.0.3",
    "react-native-json-tree": "^1.2.0",
    "react-native-keyboard-aware-scroll-view": "^0.8.0",
    "react-native-router-flux": "^4.0.6",
    "react-native-tab-navigator": "^0.3.4",
    "react-native-vector-icons": "^6.4.2"
  },
  "devDependencies": {
    "@babel/core": "7.4.3",
    "@babel/runtime": "7.4.3",
    "babel-jest": "24.7.1",
    "jest": "24.7.1",
    "metro-react-native-babel-preset": "0.53.1",
    "react-test-renderer": "16.8.3"
  },
  "jest": {
    "preset": "react-native"
  }
}

---

您提供的信息不足。注册的请求和响应是什么。请检查您的web控制台。@Bhagirath我没有响应，因为我有这种错误。我的日志给了我这个（我更新我的帖子）您是否在服务器上收到了相应请求的请求日志/访问日志？如果没有，请尝试@Bhagirath建议的解决方案谢谢您的回答，在您链接的问题中，没有关于android的内容，他们谈到了internet权限，但我给出了以下信息：/您是否在清单文件中添加了internet权限？