My Flask server on not works at my Ionic app

I have a problem, when giv my Falsk py to cloud serve works at Hi, I have a problem, when I giv my Falsk py to cloud serve works at Chrome, but not works at app.

This is my

from flask import Flask, jsonify,request
from posts import posts


def index():
    lang = request.headers.get("Accept-Language", 'sk')[:2]

    p = list(map (lambda post: translate(post, lang), posts))

    return jsonify(p)

def translate(post, lang):
    translation = next (t for t in post['translations'] if t['locale'] == lang)

    return {
        "id": post ['id'],
        "title": translation ['title'],
        "description": translation ['description'],
        "image": post['image'],

Works at Chrome, I see this.

And my app code is

import { Component, OnInit } from '@angular/core';
import { HttpClient, HttpHeaders } from '@angular/common/http';

  selector: 'app-posts2',
  templateUrl: './posts.component.html',
  styleUrls: ['./posts.component.scss'],
export class PostsComponent implements OnInit {
  posts:any = [];
  constructor(private http: HttpClient) { }


  ngOnInit() {

    const lang = localStorage.getItem('lang') || 'sk';
    const headers = new HttpHeaders({
      'Accept-Language': lang
    this.http.get('', {
      headers: headers
      this.posts = data;


when I run my application real on Android Studio Drive then I have empty screen.

I have this cloud on my application on butoon click

How is problem? I paste the cloud Url to app.