Net Core Web Api not reachable from React Native

I'm trying to develop a react native mobile app. I'm at the begin of the project and I'm already stuck.

I created in VS 2019 a new Api Web Application. I'm trying to call WeatherForecastController (created from visual studio).

I edited the startup.cs in order to avoid CORS issue.

public class Startup
{
    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }

    public IConfiguration Configuration { get; }

    // This method gets called by the runtime. Use this method to add services to the container.
    public void ConfigureServices(IServiceCollection services)
    {
        //services.AddCors();
        services.AddControllers();
        services.AddMvc();
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }

        app.UseCors(builder =>
        {
            builder.AllowAnyOrigin()
            .AllowAnyHeader()
            .AllowAnyMethod();
        });

        app.UseHttpsRedirection();

        app.UseRouting();

        app.UseAuthorization();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapControllers();
        });
    }
}

I installed axios in my React Native Projects.

And this is how I call my api:

componentDidMount() {
axios.get('http://localhost:55622/weatherforecast').then(function (response) {
  console.log("POST RESPONSE: " + JSON.stringify(response));
});

}

The error I receive is:

[Unhandled promise rejection: Error: Network Error]
- node_modules\axios\lib\core\createError.js:15:17 in createError
- node_modules\axios\lib\adapters\xhr.js:80:22 in handleError
- node_modules\event-target-shim\dist\event-target-shim.js:818:39 in EventTarget.prototype.dispatchEvent
- node_modules\react-native\Libraries\Network\XMLHttpRequest.js:574:29 in setReadyState
- node_modules\react-native\Libraries\Network\XMLHttpRequest.js:388:25 in __didCompleteResponse
- node_modules\react-native\Libraries\vendor\emitter\EventEmitter.js:190:12 in emit
- node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:436:47 in __callFunction
- node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:111:26 in __guard$argument_0
- node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:384:10 in __guard
- node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:110:17 in __guard$argument_0
* [native code]:null in callFunctionReturnFlushedQueue

I tried in both http and https ways.

I also tried to call some public apis like 'https://facebook.github.io/react-native/movies.json' and it works correctly.

Call the same url from postman, it works correctly.

I'm using .Net Core 3.0 and here are the dependencies of my react native project:

  "dependencies": {
"@expo/samples": "~36.0.0",
"@expo/vector-icons": "~10.0.0",
"@react-navigation/web": "~1.0.0-alpha.9",
"axios": "^0.19.1",
"expo": "~36.0.0",
"expo-asset": "~8.0.0",
"expo-constants": "~8.0.0",
"expo-font": "~8.0.0",
"expo-image-picker": "~8.0.0",
"expo-permissions": "~8.0.0",
"expo-web-browser": "~8.0.0",
"galio-framework": "^0.6.3",
"react": "~16.9.0",
"react-dom": "~16.9.0",
"react-native": "https://github.com/expo/react-native/archive/sdk-36.0.0.tar.gz",
"react-native-gesture-handler": "~1.5.0",
"react-native-maps": "0.26.1",
"react-native-reanimated": "~1.4.0",
"react-native-screens": "2.0.0-alpha.12",
"react-native-signalr": "^1.0.6",
"react-native-web": "~0.11.7",
"react-navigation": "~4.0.10",
"react-navigation-stack": "~1.10.3",
"react-navigation-tabs": "~2.6.2",
"react-redux": "^7.1.3",
"redux": "^4.0.5",
"redux-thunk": "^2.3.0"

}

Could you please help me to find a way to solve this problem? Thank you in advance.