NullInjectorError: R3InjectorError(AdminLayoutModule)[HomeService -> HomeService -> HttpClient -> HttpHandler -> HttpHandler -> HttpHandler]: NullInjectorError: No provider for HttpHandler! code example

Example 1: NullInjectorError: No provider for HttpClient!

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

Example 2: No provider for HttpClient!

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