Module not found: Error: Can't resolve 'rxjs/Observable' in '/Users/emish/kondo/node_modules/@ionic-native/screen-orientation'

Bug Report

Ionic Info Run ionic info from a terminal/cmd prompt and paste the output below.

Ionic:

   ionic (Ionic CLI)          : 4.1.1 (/usr/local/lib/node_modules/ionic)
   Ionic Framework            : @ionic/angular 4.0.0-beta.3
   @angular-devkit/core       : 0.7.4
   @angular-devkit/schematics : 0.7.4
   @angular/cli               : 6.1.4
   @ionic/ng-toolkit          : 1.0.7
   @ionic/schematics-angular  : 1.0.5

Cordova:

   cordova (Cordova CLI) : 8.0.0
   Cordova Platforms     : android 7.0.0
   Cordova Plugins       : cordova-plugin-ionic-keyboard 2.1.2, cordova-plugin-ionic-webview 2.0.3, (and 4 other plugins)

System:

   ios-deploy : 2.0.0
   ios-sim    : 7.0.0
   NodeJS     : v9.2.0 (/usr/local/bin/node)
   npm        : 6.4.0
   OS         : macOS High Sierra
   Xcode      : Xcode 9.4.1 Build version 9F2000

Describe the Bug Failed to compile.

./node_modules/@ionic-native/screen-orientation/index.js Module not found: Error: Can’t resolve ‘rxjs/Observable’ in ‘/Users/emish/kondo/node_modules/@ionic-native/screen-orientation’

Steps to Reproduce 1- Install the Cordova and Ionic Native plugins: $ ionic cordova plugin add cordova-plugin-screen-orientation $ npm install --save @ionic-native/screen-orientation

2- add it to the application as in the documentation

[Anthony2539]

I think you have to use "@ionic-native/screen-orientationr": "5.0.0-beta.14", and import import { ScreenOrientation } from '@ionic-native/screen-orientation/ngx';

[guillefd]

For Ionic 4 beta native plugin installation the import path must end with /ngx.
Follow the guide https://beta.ionicframework.com/docs/native/#Add_Plugins_to_Your_App_Module

To use a plugin, import and add the plugin injectable to a @NgModule. For Angular, the import path should end with /ngx.