小编Sub*_*Dey的帖子

我最近将我的项目从Angular5更新为Angular6.该项目正在成功构建,但我在浏览器控制台中收到以下错误:

未处理的Promise拒绝:StaticInjectorError(AppModule)[options]:StaticInjectorError(Platform:core)[options]:NullInjectorError:没有选项提供者!; 区域:; 任务:Promise.then; 值:错误:StaticInjectorError(AppModule)[options]

有关如何调试这些问题的任何想法？

这是我的app.module:

import { BrowserModule } from '@angular/platform-browser';
import { ServiceWorkerModule } from '@angular/service-worker';
import { environment } from '../environments/environment';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { HttpClientModule, HTTP_INTERCEPTORS } from '@angular/common/http';
import { RouterModule, Routes } from '@angular/router';
import { CookieModule } from 'ngx-cookie';
import { PushNotificationsModule, PushNotificationsService } from 'ng-push';

// importing notifications module (angular 2 notifications)
import { SimpleNotificationsModule, …