离子3-无法找到模块路径

Question

我是从npm安装了signaturePad的插件！不知怎的，我想出了这个错误！它基本上是什么意思？！我需要做些什么来解决这个问题！有人请帮帮我！我在这里给我的app.module.ts文件！

app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { ErrorHandler, NgModule } from '@angular/core';
import { IonicApp, IonicErrorHandler, IonicModule } from 'ionic-angular';
import { BarcodeScanner } from '@ionic-native/barcode-scanner';
import { Camera } from '@ionic-native/camera';


import { MyApp } from './app.component';
import { HomePage } from '../pages/home/home';
import { ListPage } from '../pages/list/list';
import {TabsPage} from "../pages/tabs/tabs";


import { StatusBar } from '@ionic-native/status-bar';
import { SplashScreen } from '@ionic-native/splash-screen';
import {ContactPage} from "../pages/contact/contact";


@NgModule({
  declarations: [
      MyApp,
      HomePage,
      ListPage,
      TabsPage,
      ContactPage
  ],
  imports: [
    BrowserModule,
    IonicModule.forRoot(MyApp),
  ],
  bootstrap: [IonicApp],
  entryComponents: [
      MyApp,
      HomePage,
      ListPage,
      TabsPage,
      ContactPage
  ],
  providers: [
    StatusBar,
    SplashScreen,
    {provide: ErrorHandler, useClass: IonicErrorHandler},
      BarcodeScanner,
      Camera
  ]
})
export class AppModule {}