Angular 5: ERROR in src/app/app.module.ts(24,24): error TS2307: Cannot find module 'https'

I am getting an error when running "ng serve" for Angular. I have seen some other issues with the same message number but they are for Angular 2, Angular 4.x, etc.

What can I do to resolve the problem?

Below is the app.module.ts file

TIA

UPDATE-STILL HAVING THE PROBLEM

I believe I marked the message resolved too early I am getting the following errors when running `ng serve` under Angular 5:

ERROR in src/app/app.module.ts(24,24): error TS2307: Cannot find module 'https'.
src/app/pages/auth-admin/admin-model/user.ts(1,35): error TS2307: Cannot find module 'constants'.
src/app/pages/auth-admin/admin-services/admin-services/admin-services.service.ts(5,25): error TS2307: Cannot find module 'cluster'.
webpack: Failed to compile.


If I save a document, then the "webpack" compiles. I had thought about upgrading the system (in hopes that this would resolve the problem) but am not sure if that would be the case.

Any assistance on how to come about the issue is appreciated.

TIA

UPDATE - FOUND OUT WHAT THE PROBLEM WAS Basically, I did not understand the error message :-|

I thought it had something to do with my version of Angular 5 - so - I upgraded using the following info:

SOURCE: https://github.com/angular/angular-cli/issues/4391

[updating globally]
npm uninstall -g angular-cli
npm cache clean
npm install -g @angular/cli@latest

[ updating the project ]
rm -rf node_modules dist
npm uninstall --save-dev angular-cli
npm install --save-dev @angular/cli@latest
npm install
ng update


I tried to start the server with ng serve

The message I got was:

ERROR in src/app/app.module.ts(24,24): error TS2307: Cannot find module 'https'.
src/app/pages/auth-admin/admin-model/user.ts(1,35): error TS2307: Cannot find module 'constants'.
src/app/pages/auth-admin/admin-services/admin-services/admin-services.service.ts(5,25): error TS2307: Cannot find module 'cluster'.


I actually checked the files that were mentioned in the error message and saw something like this (which was in app.module.ts)

import { Server } from 'https';
​

as an example.

The same applied to the other files. I do not know how they got there - but - I commented them out and the server started. So again, I did not really get the message. New to Angular though.

TIA

app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { NgModule } from '@angular/core';

import { AgmCoreModule } from '@agm/core';
import { CalendarModule } from 'angular-calendar';

import { routing } from './app.routing';
import { AppSettings } from './app.settings';

import { AppComponent } from './app.component';
import { NotFoundComponent } from './pages/errors/not-found/not-found.component';


import { FormsModule } from '@angular/forms';


import { AdminServicesService } from './pages/auth-admin/admin-services/admin-services/admin-services.service';
import { Server } from 'https';


import 'rxjs/add/operator/switchMap';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/shareReplay';


import { HttpClientModule } from '@angular/common/http';


@NgModule({
declarations: [
AppComponent,
NotFoundComponent
],
imports: [
HttpClientModule,
BrowserModule,
FormsModule,
BrowserAnimationsModule,
AgmCoreModule.forRoot({
apiKey: 'AIzaSyDe_oVpi9eRSN99G4o6TwVjJbFBNr58NxE'
}),
CalendarModule.forRoot(),
routing
],
providers: [ AppSettings, AdminServicesService ],
bootstrap: [ AppComponent ]
})
export class AppModule { }


currently running

Angular CLI: 1.6.1
Node: 8.9.4
OS: win32 x64
Angular: 5.1.1
... animations, common, compiler, compiler-cli, core, forms
... http, language-service, platform-browser
... platform-browser-dynamic, router

@angular/cli: 1.6.1
@angular-devkit/build-optimizer: 0.0.38
@angular-devkit/core: 0.0.23
@angular-devkit/schematics: 0.0.42
@ngtools/json-schema: 1.1.0
@ngtools/webpack: 1.9.1
@schematics/angular: 0.1.13
typescript: 2.4.2
webpack: 3.10.0

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