title: Module not found: Error: Can't resolve 'rxjs/add/operator/catch' in 'F:\Angular\HttpServices\http-services\src\app'
body: <p>Here is my code. </p>
  
  <pre><code>import { injectable } from '@angular/core';
  import { Http } from '@angular/http';
  import 'rxjs/add/operator/catch';
  
  @Injectable({
      providedIn: 'root'
  })
  export class PostsService {
      private url = 'https://jsonplaceholder.typicode.com/posts';
      constructor(private http : Http ) { }
      getPosts {
          return this.http.get(this.url);
      } 
  
      deletePost(id) {
          return this.http.get(this.url + '/' + id);
      }
  }
  </code></pre>
  
  <p>I am doing this code on my PC it's working but not working on a laptop. It seems funny but this is true.<br>
  This is the structure of my project</p>