ngb-accordion or ngb-panel do not appear

First and most importantly Check if the third party import is correct and the import is in the right module Either import NgbModule or NgbAccordionModule import { NgbAccordionModule } from ‘@ng-bootstrap/ng-bootstrap’; … import: [ NgbAccordionModule ] … Basic code for the ngb-accordion: <ngb-accordion activeIds=”test-panel”> <ngb-panel title=”Accordion Panel 1″ id=”test-panel”> <ng-template ngbPanelContent> This is accordion panel