Я работаю с Ionic 3, просто выбираю шаблон aws по умолчанию и получаю сообщение об ошибке:

> ionic start app0 aws // aws is a default starting app in Ionic3 
> cd app0
> ionic serve

Когда я обслуживаю:

Ошибка:

[app-scripts] [16:44:12]  typescript: node_modules/aws-amplify/lib/PubSub/Providers/MqttOverWSProvider.d.ts, line: 2 
[app-scripts]             Cannot find type definition file for 'zen-observable'. 
[app-scripts]        L1:  import { Client } from 'paho-mqtt';
[app-scripts]        L2:  import * as Observable from 'zen-observable';
[app-scripts]        L3:  import { AbstractPubSubProvider } from './PubSubProvider';
[app-scripts] [16:44:12]  typescript: node_modules/aws-amplify/lib/PubSub/Providers/PubSubProvider.d.ts, line: 1 
[app-scripts]             Cannot find type definition file for 'zen-observable'. 
[app-scripts]        L1:  import * as Observable from 'zen-observable';
[app-scripts]        L2:  import { PubSubProvider, ProvidertOptions } from '../types';
[app-scripts]             Cannot find type definition file for 'zen-observable'. 
[app-scripts] [16:44:12]  typescript: node_modules/aws-amplify/lib/PubSub/PubSub.d.ts, line: 1 
[app-scripts]        L1:  import '../Common/Polyfills';       
[app-scripts]        L2:  import * as Observable from 'zen-observable';
[app-scripts] [16:44:12]  typescript: node_modules/aws-amplify/lib/PubSub/types/Provider.d.ts, line: 1 
[app-scripts]             Cannot find type definition file for 'zen-observable'. 
[app-scripts]        L1:  import * as Observable from 'zen-observable';
[app-scripts]        L2:  import { ProvidertOptions } from './PubSub';

Ионная информация:

Ionic:

ionic (Ionic CLI) : 4.3.1

System:

NodeJS : v8.9.4 npm : 6.4.1 OS : Linux 4.13