Error in ng-bootstrap.js ng-bootstrap Angular 6

Question

I've just installed ng-bootstrap in my Angular project and after that I've include its modules. But my CLI shows me an error.

"WARNING in ./node_modules/@ng-bootstrap/ng-bootstrap/fesm5/ng-bootstrap.js 9853:57-75 "export 'ɵɵdefineInjectable' was not found in '@angular/core'"

app.module

import {NgbModule} from '@ng-bootstrap/ng-bootstrap';
import {NgbPaginationModule, NgbAlertModule} from '@ng-bootstrap/ng-bootstrap';

@NgModule({
  imports: [
    CommonModule,
    NgxPaginationModule,
    NgbModule,
    NgbPaginationModule,
    NgbAlertModule,
    RouterModule.forChild(routes)
  ],

Package.json

{
  "name": "eastlaw",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^6.1.10",
    "@angular/cdk": "^8.0.1",
    "@angular/common": "^6.1.0",
    "@angular/compiler": "^6.1.0",
    "@angular/core": "^6.1.0",
    "@angular/forms": "^6.1.0",
    "@angular/http": "^6.1.0",
    "@angular/material": "^8.0.1",
    "@angular/platform-browser": "^6.1.0",
    "@angular/platform-browser-dynamic": "^6.1.0",
    "@angular/router": "^6.1.0",
    "@ng-bootstrap/ng-bootstrap": "^5.0.0-rc.0",
    "@ngx-loading-bar/router": "^4.2.0",
    "core-js": "^2.5.4",
    "jquery": "^3.4.1",
    "ng2-slim-loading-bar": "^4.0.0",
    "ngx-pagination": "^4.0.0",
    "ngx-slick": "^0.2.1",
    "ngx-slick-carousel": "^0.4.4",
    "npm": "^6.9.2",
    "rxjs": "6.0.0",
    "rxjs-compat": "^6.5.2",
    "slick-carousel": "^1.8.1",
    "zone.js": "~0.8.26"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.7.0",
    "@angular/cli": "~6.1.5",
    "@angular/compiler-cli": "^6.1.0",
    "@angular/language-service": "^6.1.0",
    "@types/jasmine": "~2.8.6",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "~8.9.4",
    "codelyzer": "~4.2.1",
    "jasmine-core": "~2.99.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~1.7.1",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.0",
    "karma-jasmine": "~1.1.1",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.4.0",
    "ts-node": "~5.0.1",
    "tslint": "~5.9.1",
    "typescript": "~2.7.2"
  }
}

Answer 1

If you are running an Angular 6 app make sure you have installed ng-bootstrap 3.x.x. If you really need to use that specific version of ng-bootstrap consider upgrading your Angular version. For more details on compatibility check the docs.

Answer 2

get update to your angular CLI to reach the list of minimal required versions of Angular and Bootstrap CSS for ng-bootstrap

ng update @angular/cli @angular/core

go to this page and read the Dependencies https://ng-bootstrap.github.io/#/getting-started#installation

to check your angular version

ng -v