Getting ERROR Error: Uncaught (in promise): NullInjectorError: No provider for eF, when I hit...

I am getting NullInjectorError error when I am trying to use a service in my angular app. Below are my app.module.ts, admin.service.ts, angular.json(I have made a few changes to the default configs here) and package.json

app.module.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AngularEditorModule } from '@kolkov/angular-editor';


import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { AdminCrudComponent } from './components/admin-crud/admin-crud.component';
import { FormInputComponent } from './components/form-input/form-input.component';
import { FormsModule } from '@angular/forms';
import { HttpClientModule } from '@angular/common/http';


@NgModule({
declarations: [
AppComponent,
AdminCrudComponent,
FormInputComponent
],
imports: [
BrowserModule,
AppRoutingModule,
FormsModule,
AngularEditorModule,
HttpClientModule,
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }


admin.service.ts

import { HttpClient, HttpHeaders } from '@angular/common/http';
import { Injectable } from '@angular/core';
import { URLConfig } from '../config/url.config';
import { environment } from '../../environments/environment';

@Injectable({ providedIn: 'root' })
export class AdminService {

constructor(private httpclient:HttpClient, private urlConfig: URLConfig) { }

createItem(item: any) {
const service = this.urlConfig.getConfig(environment.env);
const url = service.shreeArtsService + 'items';
const headers = new HttpHeaders();
headers.append('Content-Type', 'multipart/form-data');
return this.httpclient.post(url, item, {headers: headers});
}
}


angular.json

{
"$schema": "./node_modules/@angular/cli/lib/config/schema.json",
"version": 1,
"newProjectRoot": "projects",
"projects": {
"client": {
"projectType": "application",
"schematics": {
"@schematics/angular:component": {
"style": "scss"
},
"@schematics/angular:application": {
"strict": true
}
},
"root": "",
"sourceRoot": "src",
"prefix": "app",
"architect": {
"build": {
"builder": "@angular-devkit/build-angular:browser",
"options": {
"outputPath": "dist/client",
"index": "src/index.html",
"main": "src/main.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "tsconfig.app.json",
"inlineStyleLanguage": "scss",
"assets": [
"src/favicon.ico",
"src/assets"
],
"styles": [
"src/styles.scss",
"node_modules/bootstrap/dist/css/bootstrap.min.css"
],
"scripts": ["node_modules/bootstrap/dist/js/bootstrap.bundle.min.js"]
},
"configurations": {
"prod": {
"budgets": [
{
"type": "initial",
"maximumWarning": "500kb",
"maximumError": "1mb"
},
{
"type": "anyComponentStyle",
"maximumWarning": "2kb",
"maximumError": "4kb"
}
],
"fileReplacements": [
{
"replace": "src/environments/environment.ts",
"with": "src/environments/environment.prod.ts"
}
],
"outputHashing": "all"
},
"uat": {
"budgets": [
{
"type": "initial",
"maximumWarning": "500kb",
"maximumError": "1mb"
},
{
"type": "anyComponentStyle",
"maximumWarning": "2kb",
"maximumError": "4kb"
}
],
"fileReplacements": [
{
"replace": "src/environments/environment.ts",
"with": "src/environments/environment.uat.ts"
}
],
"outputHashing": "all"
}
},
"defaultConfiguration": "prod"
},
"serve": {
"builder": "@angular-devkit/build-angular:dev-server",
"configurations": {
"prod": {
"browserTarget": "client:buildrod"
},
"uat": {
"browserTarget": "client:build:uat"
}
},
"defaultConfiguration": "uat"
},
"extract-i18n": {
"builder": "@angular-devkit/build-angular:extract-i18n",
"options": {
"browserTarget": "client:build"
}
},
"test": {
"builder": "@angular-devkit/build-angular:karma",
"options": {
"main": "src/test.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "tsconfig.spec.json",
"karmaConfig": "karma.conf.js",
"inlineStyleLanguage": "scss",
"assets": [
"src/favicon.ico",
"src/assets"
],
"styles": [
"src/styles.scss"
],
"scripts": []
}
}
}
}
},
"defaultProject": "client"
}


package.json

{
"name": "client",
"version": "0.0.0",
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build",
"start:uat": "ng serve --configuration=uat",
"startrod": "ng serve --configuration=prod",
"watch": "ng build --watch --configuration development",
"test": "ng test"
},
"private": true,
"dependencies": {
"@angular/animations": "~13.2.0",
"@angular/common": "~13.2.0",
"@angular/compiler": "~13.2.0",
"@angular/core": "~13.2.0",
"@angular/forms": "~13.2.0",
"@angular/platform-browser": "~13.2.0",
"@angular/platform-browser-dynamic": "~13.2.0",
"@angular/router": "~13.2.0",
"@kolkov/angular-editor": "^3.0.0-beta.0",
"angular-font-awesome": "^3.1.2",
"bootstrap": "^5.3.3",
"ngx-editor": "^13.0.0",
"rxjs": "~7.5.0",
"tslib": "^2.3.0",
"zone.js": "~0.11.4"
},
"devDependencies": {
"@angular-devkit/build-angular": "~13.2.0",
"@angular/cli": "~13.2.0",
"@angular/compiler-cli": "~13.2.0",
"@types/jasmine": "~3.10.0",
"@types/node": "^12.11.1",
"jasmine-core": "~4.0.0",
"karma": "~6.3.0",
"karma-chrome-launcher": "~3.1.0",
"karma-coverage": "~2.1.0",
"karma-jasmine": "~4.0.0",
"karma-jasmine-html-reporter": "~1.7.0",
"typescript": "~4.5.2"
}
}


Since I have made few config changes in angular.json that might be one of the reasons It is breaking.

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